06-09-2007, 05:45 PM
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I would get rid of the cheap goldfish and let the tank sit for several days. Ich will implant itself in bogwood and plants and even the filter cartridge but without a host fish, it will not survive for long. I would reccommend taking the fish out, bump up the heater temperature past 80F to speed up the Ich reproductive cycle, and treat the tank with a mild ich medication for maybe a week. Take the filter media out completely because carbon will remove the medication and you will want to change the filter media anyways.
The problem I see most when people start with goldfish is that they buy too many because they are so cheap. At 10-25 cents a peice, it's hard to be conservative. Are you planning on making it a goldfish tank or do you plan to go with trobical freshwater? Goldfish have a higher metabolism than most fish and therefore produce more ammonia. With no bacteria established, that ammonia builds up quick and can cause major health problems. I'm sorry you had to learn your lesson this way but for the next time, just start with a few strong fish (danios are perfect) and let them sit tight for about a month. Adding bacterial supplements (Cycle, Stability and BioSprira) will speed the process up a little bit. I actually was able to cycle my 47 gallon in about 2 weeks with 3 giant danios and Stability by Seachem. If you want to try and keep some of the goldfish you can but you will want to get rid of them at some point if you want to do tropical freshwater.