11-10-2008, 09:03 PM
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GloFish are genetically modified zebra danios, and as such their behavior is identical to that of the Zebra Danio
. Danios are usually peaceful fish, but some people find them to be nippy and therefore they might bother the angel. Also, angels generally prefer calm tankmates, but the danios are rambunctious and will never stop moving.
A 20g tank will also not be big enough to house an angelfish in the long run, as these fish can reach 10" tall and 8" long. For 3 angelfish I would want something like a 55g tank.