Definitively my Aqua Controller, makes vacations easy, and keeps people from messing with my tank when im out of town. "all you have to do is feed the fish"
my most relied on piece of equipment is my heater because it allows me to know the temperature in the tank and will always remember my information because it has a small hard drive. without my heater, my tanks temp would fluctuate.
My most valuable DIY is the stand with a beautiful wood skin that peels off on all sides for easy access from all angles. Now, the truth is I didn't make the stand or skin, but my friend did .