Tank reccomendation for a Black Moor?

thekoimaiden

Goldfish need a wide rather than tall tank as this allows more surface movement which increased the DO. Goldfish have rather large oxygen demands. The size recommendation for goldfish tanks is there because they grow so large. The min recommended size for a fancy goldfish is 29 gal. Two smaller ones or one large one. I prefer to keep 2-4 in a 55 gal. While goldfish aren't a schooling fish, they do prefer to be kept in groups.

Now on to your water change question: what are your nitrates? The answer to this question determines how much water you change and how often. Nitrates should not be above 20ppm because this can cause swim bladder issues in the fancies. You should also not house the common with the fancies. I can tell you from personal experience this will end badly. If you are intent on keeping them in the same tank, you will probably need a divider. Overfiltration does not make up for an overstocked tank.

Calmwaters

Yes it is because they are so dirty and wow you have alot of filteration! I think if you wanted to you could remove the Topfin but I would not miss a water change.

Ridewithme38

the tank came with the Topfin 30, had that running for a couple weeks and realized it wasn't enough, so i added the Aquaclear 110, running those together so the bacteria can grow on the aquaclear and not cause the whole tank to cycle again...even with that, my cycle crashed, so i ordered the 'activated sponge filters' from Angelsplus....both the 3" and the 4" to get my cycle off to a strong start...now that my tank has cycled, i've been leaving the sponge filters and topfin in just in case i need to transfer them to a quarantine tank or decide to buy that 10 gallon tank my daughter wants in here room

Calmwaters

Thats fine I thought for some reason you wanted to remove one. ; ) I keep an extra on my 55 gallon for when I need a quarentine tank.

Ridewithme38

I hate having the common in this tank, i have to trick him so i can feed the black moor and i've caught him chasing it.... but my daughter won it at a local columbus day fair we have...and the only pond i can transfer him to is full of MONSTER KOI and GOLDFISH, nothing smaller then 12"....its at my brothers wives fathers house....i don't think he'll be in the tank much longer, but i was hoping to keep him here through the winter since the pond is outdoors and unheated and we live on Long Island

thekoimaiden

That common is going to grow a lot over the winter. I strongly recommend getting a divider. Not only did I have to deal with food-snatching, I also had a bit of fin-nipping.

You are right not to introduce the common to the pond until spring. He might not be able to adjust to the falling temps if you do so now. In fact, spring and early summer are considered "koi seaspn" because that is when fish as most commonly introduced to ponds.

Ridewithme38

I was considering using a divider for feeding...you think i should use it full time? how should i split the tank 15 gallons for the common and 15 for the fantail and moor? I'm just not sure if thats enough space for any of the goldfish, the common really moves around the whole tank

thekoimaiden

Dividers are something that is best just left in the tank. They are difficult to get in and out. None of your fish are going to be happy about it, but with your setup it should be done. Just know that it is just a temporary setup. I would divide it down the middle. Leave the fancies on the side without the filter so they aren't constantly buffeted by the water. In the short term, your fish won't be the most happy, but we're playing the long game here. As long as you keep on top of the water changes and testing, you should be fine.