Review on 🐠 hygger Titanium Aquarium Heater: Digital Submersible Heater for 5-120 Gal Fish Tank – Salt Water/Fresh Water – External IC Thermostat Controller and Thermometer Included by Megan Evans

I have tetras and invertebrates that need water between 76º and 78ºF and big temperature drops really put them off. I have found that when I make water, the temperature drops to the previous value (plus or minus 0.2°F) within 15 minutes by adding room temperature water (about 71°F in my house). The only problem is that I want to set the ideal temperature at 77ºF, but for some reason this heater has a hard time keeping the exact temperature below 78ºF. I would really prefer 77ºF water but it keeps it at 76.4º on average. It's not a HUGE difference and still within the normal range for my tankmates, but it frustrates me a bit that I can never get it to settle to the actual temperature I want (hence 4/5 stars instead of 5/5 ). I would recommend keeping the temp gauge as far away as possible from any sources of moving water (filters, air stones) and glass tank walls to keep it accurate. Unfortunately (or fortunately) the transducer floats very well, so make sure it is positioned at least 2 inches from objects/tank glass/water surface for maximum accuracy.