The tank is a 4x2x2 100 gallon but I will be upgrading and trying to make a plywood tank next year sometime. it would probably be in the 500 gallon range but I'm not sure yet. My ph is high 7's but i can put peatmoss extract in if necessary. Sorry I meant to put jupari instead of daemons because i have heard they are the hardiest of the eartheaters. I would probably have some peacock bass and some smaller pimelodid cats in there and 1 indo pacific tarpon. Thats kind of why I included abalios and altifrons is their high body shape might discourage others from trying to eat them.