Hello! So we recently had a 100 watt heater for our 30 gallon tank and decided 150 would make more sense as our 100 watt heater would fluctuate way too much. However, with this new heater (aquatop - same brand as before), we’re still seeing a fluctuation. I just bought a second thermometer online in case that’s the problem but it doesn’t arrive until tomorrow. I’m just trying to get my tank up to 80 F...I was told this brand is great at not fluctuating so I’m not sure what the deal is. The red line on the heater is currently at the top of 82 F (see photo). Any thoughts? Or has anyone else had these issues? Thanks so much for your thoughts/advice!