They are 32 quart tubs made by sterilite (They all used to be in 20 gallon longs). I have my thermostat set to 93 degrees, its probe reads the 93 degrees. But a second probe attached to another thermometer on the heat tape reads 87 degrees. I cant quite get an accurate reading inside of the tubs themselves, I have accurite thermometers in each tub, with humidity reading at 65% but heat cant be right, as it only reads at 82 degrees on the warm side, and it feels warmer than that. Any suggestions on a good accurate way to read temps inside the tubs?