Join Date: Jun 2012
Location: Centreville, VA
are you running co2?
i have a 55g and a catalina single t5ho bulb. according to Hoppy and his chart, it was still medium light and would probably create some algae.. even with 1 bulb. i removed my glass canopy and made a custom lid using window screen mesh, as Hoppy has recommended before, and this has reduced my light by about 30% or so. Also my light sits on the 2 or 3" legs that are optional to purchase.
if you get 2 bulbs, i suggest removing 1 bulb, or going co2 and raising the light.