clearerphish
Aquarium Advice Activist
I have ordered a light fixture for my upcoming 55g reef project. Fixture has 2 175w MH, 2 54w T-5 Actinic, 6 lunar lights. I am building a canopy and stand myself, and need to know how high above the surface of the water would be the ideal hanging height to minimize heat transfer. Or even better, how close to the water's surface can I get these before it makes a significant difference? It's a standard 55 gal, 20 inches deep. Thanks in advance.