I have my uncles old 30 gallon tank up and running with all the fish in it ect.. The only problem is, he has no bottom feeders.. Personally, I think it's 1 fish to many, but thats just me.. It's got, 1 Goldfish, 4 gouramis, and about 8-9 mollys.. Anyway, what would you suggest for a bottom feeder for it? The tank is set at about 74 degrees.. so it's pretty low (for Wally - the goldfish) Any ideas would be helpful, thx!