70 degrees is good enough for a lot of fish such as:tinfoil barbs,orangespotted sunfish,yellow perch and even walleye,if u can bump the temp into the 75 range or so u can keep:most cichlid species,Phoenix barbs,giraffe catfish,oscars,channel catfish,American eels,bowfin,flagtail characins,Florida gars and many others.
