I have a 90gal that I plan on growing peacock bass in. I have been cycling the tank for a while and I noticed the temperature ranges from low 60's to low 70's thrughout the day. Will this stress out the peacocks and will a heater set for higher keep the temp stable? Also, what is the best ph stbalizer to use? I've never used one and I just want to get some input on brands etc. Thanks all!