07-20-2011, 12:07 AM
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I have a black moor and a golden oranda. (I also have 3 common & 1 comet goldfish in an outdoor pond).
Right now they are in a 20g long as my 55g is being used to breed convict cichlids. As soon as I am finished with the cichlids, that is where they will go back to and stay until I can get 125g (I have 5 tanks right now, so I'm a little full).
A 20 gal long is ideal because of the large surface area. I have a Aqueon 55 (for 55-75 gallon tanks) on my tank. Its a HOB, and I really like it. I have added a small bag of ceramic rings inside the tank to help with the bio load. It is also bare bottom, so technically there is more water available as you don't have to subtract for gravel and decor.
As for water changes - right now I do 10% changes on wednesday and saturday. I keep a liquid testing kit and test the water regularly. It the ammonia gets over .5 - I do another water change.
Your small fish may be fine for a while, but soon they wont be.
I started with 4 fish in a 14.5 g tank. And it wasn't long before I had a case of pop-eye, frayed fins, and a host of other problems. It forced me to do a lot of research and I still consider myself a beginner.