When we went from summer to fall and got cold overnight my tank temp dropped from 78 to 76...I had to crank up the heater to max temp to keep my tank the correct temp overnight.
6 weeks later same thing happens except as I said the heater is maxed out so I had to buy the next size larger heater.
Apex alerted me both times my temp dropped too low.
BTW; I threw a second heater in until my larger heater arrived.
I agree that a larger heater could potentially cook the tank. However, if “could” is what the concern is, a meteor “could” crash through your roof and straight into the middle of your reef, and I don’t see a lot of reefs in underground bunkers!
Trick? Risky strategy? from freshwater: get a heater that’s way too big for your tank. It has to be on far less often than something that’s “appropriately sized”. Lasts much longer and is more reliable, and you can get a temp controller relay thingy to prevent tank cooking (if you don’t trust Eheim Jager to make a heater!). My heater is rated for like 90 gallons and is actually slightly too large to even fit in the back, but barely has to run even at night. During the day the issue is overheating anyway, this thing might last forever...fingers crossed...
