My cousin recently gave me his 90 gal tank and his fish with it... He never did water changes and ironically the only fish that were alive when I got the tank were 3 fish that I had bought 2 years ago and gave to him (vampire pleco, "syno decorous" "tiger syno").. The synos are def hybrids the decorous has the coloring of real decorous but different smaller body, and the tiger has gotta be some multicat hybrid. I had planned on only adding my chocolate cichlid 3" and royal pleco 2" that are in my quarantine tank, however one of my lfs' had a Cuban cichlid 1.5" and a Paratilapia polleni also 1.5" and I bought both of them. So is this overstocked for a 90 gal? I know the cichlids are small still but I don't plan getting another tank anytime soon... Right now the filtration are 2 "schwag on the back"' as I call them ac110 and penguin 330, and I have a eheim 2217 coming from amazon.