05-10-2009, 08:40 PM
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Originally Posted by JohnnyD44
I don't plan on using the 20G once the 55G is set-up, I've read somewhere before that doing the filter will allow you to add fish almost right away
If I'm correct in assuming that your fish are those listed for your 20g under "Aquariums" then yes, I would move them all into the 55g provided the water is conditioned, proper temp and filters running. I would dose the tank with "Cycle" (or a similar biological product) when I put in the first fish to further lessen the stress on the fish (the existing filter media with bacteria will do this a bit, but it doesn't hurt to help out).
Last October I set up my 70g from scratch, used some of the media from the filter on the 90g and dosed with Cycle and had 20+ fish in the tank and no problems that I could discern (all fish lived, ate, spawned, acted normal, etc).