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Author Topic: Hole in Dorsal Fin  (Read 977 times)
Button
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Hole in Dorsal Fin
« on: January 21, 2012, 08:52:38 AM »

I am new to keeping fish, I have a biOrb and two fish one fantail and on black moor. I was feeding them and noticed that my black moor has a small hole in his dorsal fin, should I be worried about it?
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Skwishee
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Re: Hole in Dorsal Fin
« Reply #1 on: January 21, 2012, 10:15:04 AM »

May I ask what size is the biOrb?

Could you describe the hole in a little more detail? I.e. is it white around the edges? Is the hole at the edge of his fin or in the middle? Have you noticed if the Fantail is acting aggressive in anyway towards the Moor?

Also, have you cycled the tank?
If you have a water testing kit or a local aquarium shop, you could take your water too, to get tested as it would be useful to know the current water quality with regards to ammonia, nitrite and nitrate  Smiley
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fantailer
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Re: Hole in Dorsal Fin
« Reply #2 on: January 21, 2012, 11:00:13 AM »

Skwishee they come at the maximum size of: 16 gallons.

So Button your tank is overcrowded and you need a 20 gallon soon.
Just get some goldfish salt and add the amount the package says for your size tank.
It could just be genetic but just to make sure.

Button your fish could have fin rot, nitrate posioning, or just an agressive friend. So you should do what Skwishee says as he covered most of. If your fantail is attacking the black moor seperate him in a 5 gallon for a day or two and put him back

Hope this helps Wink
« Last Edit: January 21, 2012, 11:07:56 AM by fantailer » Logged
Button
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Re: Hole in Dorsal Fin
« Reply #3 on: January 21, 2012, 11:11:29 AM »

Itís a 30lt biOrb. The hole is a small pin sized hole in between two ridges on the tail end of his dorsal fin. There is no discolouration of any kind, edges are smooth. It looks as if it has been pierced by something.

Have only had both of them for a few weeks and have tested the water every 7 days since I set the tank up and all the tests came back ok. I followed all the instructions for set up, putting fish in, and water changing.

The fantail doesnít seem aggressive.

The Moor is very active and loves to eat, have seen no change in it behaviour since I put him in the tank.
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Skwishee
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Re: Hole in Dorsal Fin
« Reply #4 on: January 21, 2012, 03:18:30 PM »

Hi Button, lovely to hear from you  Smiley
I'm afraid to say that you may also need to upgrade the fishes accommodation. May I ask what size they are currently?
The recommendations I've seen in most places for fancy goldfish, is 40 litres per fish, you would need at least an 80 litre tank. So this is just something for you to keep in mind, rectangular tanks are usually the best, as they provide more swimming length and surface area, than a biOrb.

I know it seems a lot for one fish, but goldfish are extremely messy and grow quite a lot, most fancies achieve around 6 - 8 inches in length, sometimes more. So when being kept in too small a tank for too long, they can become stunted and can poison themselves with their own waste.

If you are un able to afford a larger tank right now, which is understandable, we all have bills to pay at the end of the day! You could always ask around friends and family. Gumtree, Ebay and Freecycle can all have good deals.
Or see if you can save up some money, the fish will be okay in the biOrb for now, but will need moving eventually.

I, myself was in a similar situation, so I can understand the position. I had two goldfish in a 21 litre tank, I lost one after a week, but my other goldfish Lucky, is doing okay. She was in the 21 litre tank for 5 months in total, but those last 2 months she didn't grow at all and I've now upgraded her to a 90 litre tank (which used to belong to my Dad).

That aside, how often and how much are you changing the water?  Smiley

As for the hole in the moor, I'm not sure what could have caused this if it isn't the fantail and it doesn't sound like any kind of fin rot..... The hole definitely wasn't there when you first got the moor?
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Button
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Re: Hole in Dorsal Fin
« Reply #5 on: January 21, 2012, 03:45:54 PM »

Hi Skwishee,

Thank you so much for your posts, I am new to keeping fish and worried about most things killing my fish! I have been changing the water every 2 weeks and about a third of the water each time.

I'll have to look at getting a bigger tank if its going to be bad for them being in the one I have. All the info I read on them said I could keep 2 in there and so did the shop keeper who I got them from.

Thank you again for your help
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Skwishee
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Re: Hole in Dorsal Fin
« Reply #6 on: January 21, 2012, 04:16:59 PM »

Heya,

A slightly larger weekly water change will be much better, than once a fortnight (fortnightly is usually for tropical fish who make less mess). My aim on my large tank is to change at least 50% each week  Smiley

May I ask what information it was you read that said two fantails would be okay in the biOrb?
I had an interesting leaflet with one my fish products, that stated I could keep one 2-3" goldfish for every 4.5 litres of water!
The leaflet did mention the size goldfish can grow too, but didn't make this particular important piece of information prominent enough, I easily missed it and had I not come here, I would have probably ended up with 3 or 4 fish in the 20 litre tank, thinking it would be fine!
 Most of the information I've come across, suggests bowls are generally bad for the lack of swimming space and small surface area at the top, means less oxygen.

Good luck with getting a larger tank!! The bigger, the better, as goldfish like lots of space ^_^

We've all made the same mistake at one time or another  Smiley So you aren't alone!
It doesn't help when every aquarium box has pictures of a dozen or so happy goldfish in it! XD
« Last Edit: January 21, 2012, 06:23:37 PM by Skwishee » Logged
fantailer
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Re: Hole in Dorsal Fin
« Reply #7 on: January 21, 2012, 04:25:36 PM »

You got that right I started out with Orbitz and Titan in the 10 gallon November 2010.
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Nossie
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Re: Hole in Dorsal Fin
« Reply #8 on: January 22, 2012, 05:22:25 AM »

I had a biOrb, and it has a pamphlet with it saying that "three small fantails" would do just fine Wink Note the word "small".
In my experience, the filter system is far too weak, not to mention the small surface area and the small sizes.

The ideal setup for these two fish would be a 100-140 liter tank with an external filter that would pump 1000-1400 liters per hour Smiley
In the meantime, I suggest you skip the care instructions that came with the biOrb (a 20% water change every 3 weeks) and start taking out 50% every single week until you can find a bigger tank. Your fish will do just fine in the orb for a few more months maximum if necessary. Good luck finding the new tank, and keep us posted Smiley
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tmniy
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Re: Hole in Dorsal Fin
« Reply #9 on: July 23, 2012, 12:26:23 AM »

(Link is not visible to guests. Please register to view.)
May I ask what size is the biOrb?

Could you describe the hole in a little more detail? I.e. is it white around the edges? Is the hole at the edge of his fin or in the middle? Have you noticed if the Fantail is acting aggressive in anyway towards the Moor?

Also, have you cycled the tank?
If you have a water testing kit or a local aquarium shop, you could take your water too, to get tested as it would be useful to know the current water quality with regards to ammonia, nitrite and nitrate  Smiley

I also have same question ...
is it common for the black more
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tmniy
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Re: Hole in Dorsal Fin
« Reply #10 on: July 23, 2012, 12:27:33 AM »


I also have same question ...
is it common for the black more??
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Nossie
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Re: Hole in Dorsal Fin
« Reply #11 on: July 23, 2012, 09:14:25 AM »

Are you trying to contribute to the thread or ask for advice for yourself? This is an old thread so it doesn't usually help bumping it Tongue
If you want help, feel free to start your own.
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fantailer
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Re: Hole in Dorsal Fin
« Reply #12 on: July 23, 2012, 10:43:17 AM »

tmniy a hole is fine in the fin. It'll just heal itself or its just born with it.
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