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Author Topic: Black spot on fin. Help!  (Read 899 times)
sophiebear
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Black spot on fin. Help!
« on: January 25, 2012, 01:18:50 PM »

Yesterday, I noticed a black/blue spot on the tip on my fantail's tail.  It seems a little slower than usual, as does my other fantail, but they are both eating just fine.  The spot seems to be a bit bigger today.  I really need help figuring out what it is. 

My tank is 15gal, set up for about two weeks.
I have one other fantail, two cory cats, and one mystery snail.
I just tested the water and below are the results:

Ammonia: >.02ppm
NitrIte: 0ppm
NitrAte: about 30ppm
pH: about 7.4
Temp: 75F

I do a about a 25% water change weekly and use kordon NovAqua Plus water conditioner.
I just installed (last night) a new filter.  It's an Aqua Clear power filter for 5-20 gals. It does 100gpm.

Picture 1 shows the spot.
Picture 2 shows my indicators.
Picture 3 shows both fantails so you can see they look healthy otherwise.

[image]

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Short backstory: I worked for a small office (3 people) who were struggling with sales.  My manager decided one day to Feng Shui the place which apparently meant getting a goldfish.  She bought him, a net, water conditioner and a one gallon bowl.  I noticed the poor fish was always gasping for air so I began daily water changes. I soon bought him a 5.5 gal tank with filter; so my manager quickly bought another fish.  The company went out of business and since I was the only one who actually cared about the fish, he was given to me.  I am really trying hard to do things right and make a great home for them.
My dad had freshwater when I was little then graduated to salt water. Thankfully, he is very knowledgeable, but we live several states away so it's hard for him to help. 
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sophiebear
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Re: Black spot on fin. Help!
« Reply #1 on: January 25, 2012, 01:25:04 PM »

Oops, I meant my filter cycles 100  gpH, not M!  lol

Also, After researching online, I think the spot my be a bacteria?  I bought Melafix last night.

I bought Microbe-Lift Special Blend and Gravel & Substrate Cleaner las night but I haven't used them yet.


I've fed my cats algae wafers that my goldies have been eating too.  Could the spot be from that?
« Last Edit: January 25, 2012, 01:34:23 PM by sophiebear » Logged
Nossie
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Re: Black spot on fin. Help!
« Reply #2 on: January 25, 2012, 01:39:10 PM »

That spot is nothing serious, anything black on a goldfish means bruise, it's healing. Your water quality seems decent, but you do have the nitrates a tad high, I say perform a 50% water change and vacuum the gravel Smiley

Also, you'll need a bigger tank for all these fish Wink I would suggest a 25 o 30 gallon if you can find one, but for now your fish will be fine as long as you test the water and change out 50% every time the nitrates reach 30 Smiley
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sophiebear
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Re: Black spot on fin. Help!
« Reply #3 on: January 25, 2012, 01:54:44 PM »

Good!  I am so glad to hear it's nothing to worry about. 
I know I will need a bigger tank soon.  And I'm already saving money to get it!  lol

Thank you!
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Nossie
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Re: Black spot on fin. Help!
« Reply #4 on: January 26, 2012, 03:20:01 AM »

Great! Smiley In case you bump into any other trouble, feel free to ask any questions you might have Smiley
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