(Sorry for the double post, but my edit time ran out!)
I guess what I should be asking, really, is what's the minimum tank size for a small school of Congro Tetras? I've been reading online, and different sources say different things. Some sources say 30g, and some say 20g. Just like for my pearl gourami before getting it, some sources said 30g and some said 20g. He seems to be doing more than fine in my 20g long.
So, any input would be great. Thanks.