Review on Innovative Marine Helio Aquarium Heater by Boss Spangler

Favorite Heater I've Ever Owned. I have been keeping coral/fish for 25 years. Yes, it's expensive, but if you need accurate, high-quality data with built-in redundancy. Then this heater is for you. One minus, and this is the minus of all aquarium heaters. It doesn't have a variable frequency drive to deliver a specific amount of watts to the heater. Also, I would like to be able to set to 1/10th of a degree. Actually sophistry here, but to be honest. Zero regrets.