Okay, thanks for the response ! Maybe you could help me with something else.
Its an aqueon 50 watt submersible heater up to 20 gallons. Neither of my thermometers say 88 yet, the highest it gets it my jw white one and it only says 82 degrees.Hmm, it’s weird that they say different temperatures. Does your tank have enough water flow? Maybe there are different temperatures in different places in the tank. Or you have a faulty thermometer lol. What heater do you have? Maybe its a heater issue. Also, lace catfish get biiiiggg, they’d need somewhere around a 55 gallon for one but preferably a 75 gallon because they like to be in groups. Just a heads up. Also, did you cycle your tank? And can you post parameters please. Thanks