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Author Topic: which filter for 75 gallon tank?  (Read 6252 times)
Summer Time
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Re: which filter for 75 gallon tank?
« Reply #60 on: January 16, 2011, 12:31:17 AM »

Reading the manual for the Fluval canister. Page 7 says "Be sure to position the intake tube away from any air source..... will diminish filter efficiency."

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Nossie
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Re: which filter for 75 gallon tank?
« Reply #61 on: January 16, 2011, 05:59:26 AM »

I change nothing less than 50% in my tank, because anything smaller won't make a difference. Beneficial bacteria live in the filter and the substrate, not in the water. So after a thorough cleaning of the gravel, I empty the rest of the water out of the tank.

By the way, nitrates are constantly building up, so removing 10-20% won't remove ANY waste whatsoever, next week you'll have all of it and more right back. In the end, the nitrates will be slowly building up on you until you're getting problems with the fish and water quality. Especially when it comes to goldfish, who are quite the waste-makers Grin
Think of it as the water turns red every week, you're just slightly diluting the red with the water changes, and it will turn darker and darker by the month.
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #62 on: January 16, 2011, 12:50:36 PM »

 any water change u do will take out nitrates more matter how small even a 5% will take a bit out. and if u have some algae growing that will take out more nitrates

check out the water changing part is this site it says 15% to 20% for most tank or do u think this site is bull crap nossie and is all wrong
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Summer Time
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Re: which filter for 75 gallon tank?
« Reply #63 on: January 16, 2011, 01:17:15 PM »

My nitrates stay low with 20%, but my tanks are under stocked. If you have more, bigger fish, you may need to change more. Also if you feed more protein, you will have more ammonia, and your tank will adjust accordingly, so you may end up with more nitrates because your bacterial colonies are built up to handle the heavier load.

I wouldn't do more than 50% tho.
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Mindemae
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Re: which filter for 75 gallon tank?
« Reply #64 on: January 16, 2011, 02:35:41 PM »

Summertime, I am so glad you did not buy the magnum 350 canister filter...it is crap.
It is the only filter I have had trouble with cycling a tank.
The eheim worked beautifully and the fluval is wonderful but the marineland 350...what a nightmare. Angry
I cleaned it out and added a new sleeve. It was so dirty from the previous owner and he obviously didn't clean it in a long time and was so heavy with sludge that the innner core canister totally collapsed, blew the o-ring and gaskets.  Then when I cleaned it all out added new media to the core canister and a new sleeve it spiked a a nitrite readiing even tho I have the marineland HOB 400 filter on the tank too.  Ugh I would never recommend this filter to anyone especially not to new hobbiests.
Now I will have to work like a dog not to lose any fish and get this **** nitrogen cycle back under control!! Angry Sad
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #65 on: January 16, 2011, 03:15:20 PM »

u changed the media that is why it spiked the marinland probably had all the good bacteria in your tank and u took it all out.

I love my marine land 350 HOB i find it really easy to use and clean any i never hear anything unless i stop the water flow to it while i am cleaning it u can hold a lot of media i  them to

i think it is the best hob out thier
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Nossie
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Re: which filter for 75 gallon tank?
« Reply #66 on: January 16, 2011, 03:31:17 PM »

I don't think it's all "bull crap and all wrong" but I have, through my own experience noticed that everything will work perfectly with larger water changes. And I'll repeat: especially when it comes to goldfish.

Removing "a little bit" of the nitrates aren't helping too much, because soon you need to change again when they reach 40ppm after only a few days Undecided Which is why I change half the water in my tank every time, and I can leave it alone for two weeks before the nitrates will even reach 30! It works better for ME because I am struggling with buckets, I change about 16 buckets of water every time, and that means carrying 32 buckets of 10kg before the tank is emptied and filled again.
Before you'll whine about me getting one of those siphons you can connect to the tap, I'll tell you that I sadly can't afford that for now, and I don't complain about working hard to keep the fish happy.

There are people on the forum that do the same 50% water changes and their fish thrive. So do mine Grin And a healthy environment for them is all I care about.
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Mindemae
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Re: which filter for 75 gallon tank?
« Reply #67 on: January 16, 2011, 04:11:40 PM »

Creamkiller I DID NOT change the filter media in the HOB marineland 400.
I HATE that filter too...it is noisy and should have covered the change I had to do on the canister 350 magnum but it did not.
The 350 canister marineland filter had to be changed as it just had the changeable sleeve on it.  I seriously don't think that it had been changed for almost a whole year.  It was plugged and you are suppose to change it every month.  The inside core canister did not hae ANY media in it what so ever...it was EMPTY!!  AND totally had collapsed, causing the gasket and o ring to blow! Angry
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Summer Time
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Re: which filter for 75 gallon tank?
« Reply #68 on: January 16, 2011, 04:39:16 PM »

Minde, I'm glad I didn't buy that one too.  So sorry you have to deal with it, but with your care your fish will be ok.  I know you'll put in the extra work to make up for a crummy filter.  Aren't you the one who once said she was getting up at night checking on her fish?  It might have been when ich struck from the plants.

Maybe you can find a new better filter on ebay...
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pappy-fish81
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Re: which filter for 75 gallon tank?
« Reply #69 on: January 16, 2011, 07:19:44 PM »

I do 20-50% water change depending on the aquarium size.
creamkiller: Fish constantly pee and poo right? So, IMO it makes sense to change more than 20% of aquarium water. Especially in my case that I don't have heavily planted aquariums. Besides, if you have bigger fish also have bigger bio load.
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #70 on: January 17, 2011, 12:43:52 AM »

i dont get it i love my marine land hob 350 works perfect and has no noise maybe it is a different model. they did change a few years ago.

if i was doing a 50% change weekly i would do 2 25% percent less stress on the fish but it still seems high to me.
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Nossie
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Re: which filter for 75 gallon tank?
« Reply #71 on: January 17, 2011, 03:25:59 AM »

It won't be stressful for the fish if the temperature and the pH is the same in the fresh water. The amount of waste changing to the worse on the other hand WOULD BE.
In one of the books you're adviced to change 75% weekly, and 50% twice a week, as the ideal maintenance schedule. But I won't do that because it would be pretty exhausting with the buckets. Later when I'll afford a water changer, I might consider it.
Larger water changes won't allow the water quality to deteriorate as fast as small ones do = the fish won't get stressed for anything.
For now, I let the test results decide for me when to change the water and how much.

In other words, I do believe that it's "bull crap and all wrong" to think that fish would be sensitive against the removal of waste.
BUT, there are more sensitive species than goldfish, and in that case, I'd change a little less than 50% a week. But still no less than 30%.
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Bel
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Re: which filter for 75 gallon tank?
« Reply #72 on: January 17, 2011, 04:39:33 PM »

The dreaded buckets!  We had to do that with the saltwater tank and now we are going to set up something so we can make it a little easier on us.  Hubby says we can put a piece on a hosepipe and hook it up to our utility sink to fill the tank back up, can't afford the python thing I think its called.  There are two of us doing the changes though so this should be ok for now and I already have the other siphon to take the water out with.  Not sure if you have looked into that yet Nossie.  Should be cheap enough for the hosepipe and the piece to attach it with is at Lowes or homedepot.  It won't have the switches to do both ways or to turn off but it will make it so that we don't have to carry those heavy buckets any longer. 

Fingers crossed this will work.  Wink
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #73 on: January 18, 2011, 01:03:32 AM »

my mind says 50 to much

if u use buckets your temperature would be hard to keep it the same as the water that is already ready in the tank

if u use a hose for your tap that will work by the way bel my dad does it for his overstocked winter tank (500 gallons for the pond fish in winter.

but u have to put the conditioner in the water before it hits the tank after that tap water condition is to late because the chlorine will have already done damage

plus it u take out to much water the fish get stressed becuse there home is going away think about it if u own a house  and 1 time at week you were forced to live in a 2 or 1 bedroom apartment for awhile  and stuff must go in it all 4- 7 people in that apt would u be stressed
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April
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Re: which filter for 75 gallon tank?
« Reply #74 on: January 18, 2011, 01:40:45 AM »

Summer time, I just read through this thread and noticed your question about placement of an air stone too close to intake pipe...I am also curious about its effect on the efficiency of the filter. The only thing I can think of is that an air stone would cause an interruption of normal swirling movement within the tank Huh This has peaked my interest as I have an air stone in the center of the tank which may be diminishing the filter function. I think I will have to move it  Undecided  maybe get a few bubble bars to suction inside at the bottom on the opposite side...won't look as nice but oh well - just want everything to function properly in the end eh? Good luck! Grin

Minde this tank is gorgeous!!!!!! Look at all your beautiful babies they are so pretty and bright orange and eeek! I just love it  Grin
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Mindemae
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Re: which filter for 75 gallon tank?
« Reply #75 on: January 18, 2011, 05:28:56 AM »

Thank you, April!
Two of those fish are the parents of the babies I'm raising. Smiley Wink
(The ones in the breeding goldfish and koi thread) Wink Cheesy
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Mindemae
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Re: which filter for 75 gallon tank?
« Reply #76 on: January 18, 2011, 05:35:38 AM »

If the air diffuser is too close to the canister filter intake pipe, it will suck air into it and thus reduce its efficiency. Smiley
Also, it would cause it to make noise with the air in it! Wink
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Nossie
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Re: which filter for 75 gallon tank?
« Reply #77 on: January 18, 2011, 06:34:04 AM »

Bel: That would always be something to try out! Smiley I'll look into it, I should have a few extra hoses around Wink

creamkiller: That's not really how it works... no. Think of it as fresh air. If the air in your house gets really heavy and hot in the summer, it might be nice to change for some fresh air by having the windows or doors open. The more fresh air, the better. The "furniture" in the tank will stay the same, and so will the water, only fresher. Fish really aren't such sensitive creatures, and yet again: ESPECIALLY NOT GOLDFISH.

I am not trying to change your opinion, if half of the water seems much to you, then keep changing less! There's nothing more to it Tongue
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #78 on: January 18, 2011, 07:48:47 AM »

ya i know this forum is for people to put there thoughts down u dont have to listen to me

but this part i know i am right

the more air u put in a by the good bacteria the better this is how a wet dry trickle filter works

 the is a layer of filter media to get rid of the crap detus  in the water (like all water filters) falls down to drip plate that speads the water out  then fall down in drops back down to the bio ball and pick up oxygen because the more oxygen the more good bacteria back though a pump up to your tank

so the more air the better

check out la fish guy wet dry trickle filter i u dont believe me 
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #79 on: January 18, 2011, 08:12:10 AM »

this is also how a bio wheel hob works the water gets shot towards the bio wheel hits pick up air when it hits spins the wheel and goes in to the tank

when i moved  and had a mini spike i put the air hoes in my hob to get more oxygen in there
« Last Edit: January 18, 2011, 08:15:35 AM by creamkiller » Logged
Summer Time
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Re: which filter for 75 gallon tank?
« Reply #80 on: January 18, 2011, 09:23:04 AM »

Is the wet/dry filter the same thing as a canister filter? I'm new, so I'm not sure.

Anyway, my post about the air is a direct quote from the Fluval 405 instruction manual. It's mentioned twice in the instructions, one of which is in a gray box labeled "Important!".

I would think the company probably ran some tests and this is what they found.
« Last Edit: January 18, 2011, 09:27:24 AM by Summer Time » Logged
creamkiller
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Re: which filter for 75 gallon tank?
« Reply #81 on: January 18, 2011, 09:33:21 AM »

a wet dry is very different that a canister but the more oxigen the more the good bacteria can take away all the poop

detritus is attracted to air bubbles this will aslo help filter out more thing

that is how a protien skimmer works the air bubbles pick up poop and get taken out of your system

u can use a protein skimmer in fresh water most dont bease they cost a lot of money and if u had 30ppm in a saltwater tank everything would be dead that is y u need it in a salt tank
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Nossie
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Re: which filter for 75 gallon tank?
« Reply #82 on: January 18, 2011, 01:44:59 PM »

creamkiller: Yeah, that I know, common sense since the beneficial bacteria need oxygen to live just as much as the fish do.
What I don't understand, is why you're saying this??
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fantailer
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Re: which filter for 75 gallon tank?
« Reply #83 on: January 18, 2011, 04:58:32 PM »

Maybe he is saying to tell bel because she is a newbie at fishies ( not to offend anyone ). Undecided
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Bel
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Re: which filter for 75 gallon tank?
« Reply #84 on: January 19, 2011, 09:03:19 AM »

Lol, I don't even know what he's trying to tell me then. 

He was saying something about doing over 50% water changes was bad, I have never done water changes that big myself.  About the air bubbles and the filter, I dunno.  I have an air tube that runs across right in front of my intake of my filter.  Not sure if that is good or bad now, think I did get lost about that.  There are LOTS and LOTS of air bubbles in the tank now so it would be hard to make it where there are none near the intake of the filter (HOB).  Can someone clear that up for me? 
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Nossie
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Re: which filter for 75 gallon tank?
« Reply #85 on: January 19, 2011, 11:30:26 AM »

Nah, just leave your air stones/tubes where they are, it's fine Smiley

And about the water changes, as we've said already, it's better to do bigger water changes when it comes to goldfish since they are so very messy. It makes keeping the water quality in check much easier Smiley
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Mindemae
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Re: which filter for 75 gallon tank?
« Reply #86 on: January 19, 2011, 01:06:09 PM »

bel, don't worry about the HOB filter.  It's the canister filter, bubbler is too near the intake tube, it could cause your canister filter to suck in too much air and cause problems with that.  It would definately make some noise if it's a problem. Smiley
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Bel
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Re: which filter for 75 gallon tank?
« Reply #87 on: January 19, 2011, 03:39:33 PM »

Ok, ty gals  Smiley
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Summer Time
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Re: which filter for 75 gallon tank?
« Reply #88 on: January 20, 2011, 09:29:27 AM »

I think one just needs some empathy, common sense, some studying, and ability to reason things out, and some knowledgeable friends like on this forum, and you will have healthy and happy goldfish.

Sometimes we have a difference of opinion, which means that there is room for some error. Which is good, because I know I'm not perfect.   Smiley
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creamkiller
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Re: which filter for 75 gallon tank?
« Reply #89 on: January 20, 2011, 09:36:26 AM »

goldfish are 1 of the easiest fish they are tough if they can gi through a cycle with out dieing it is really not that hard
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