MT79
Aquarium Advice Addict
I'm planning for an "upgrade" to a 55 gal. I'm going with MH lighting, supplemented by 2x 48" VHOs. Regarding heat-how much more would a 250 mh put out compared to a 175? I'm basically trying to avoid adding a chiller. Should I go 2x175 or 2x250 mh? Will it make much difference? FWIW, I'm going to install a fan (or two?) in the canopy. Any advice, personal experiences much appreciated.