I have two female sliders in an indoor tank 30 gallon (use to be in 100 gallon til my young son had accident goofing around and well let's say 4 hours later and really sore hands from wringing out a thousand towels later they are temporarily in the smaller tank) my question is this....what constant temp should be a healthy number for the girls....right now the temp shows at bout 88ish? Kinda seems high to me but not sure exactly...( I inherited them from the wildlife park I use to work at) as these are the only ones I have had ..I ha e had them since a little girl turned them into me after her mother bought them downtown LA alley...2 for $5.00 I believe....terrible. But they have grown on us...we call them the Jude Sisters...one use to be a little bigger than the other but both beautiful...any offers of suggestion would be greatly appreciated....I am asking now because I replaced their old heater with this new one and it was lesser but don't know if too hot or not? Thank u.