Join Date: Nov 2007
Location: NYC & Long Island, NY
2 to 3 watts per gallon over a 5.5 gallon tank means a 10-15 watt light. The intensity of those bulbs is very low, and I'd call that low light. I had a 15 watt light over a 5 gallon tank for 6 months and could barely get ANY stem plants to grow. I had success with mosses and wild success with vallisneria for some strange reason, but stems wouldnt grow. That leads me to believe, at least, that java fern, anubias, and crypts will at least survive under 15 watts, though I havent tried it myself. IMHO opinion, 10 watts is too low.
Bunny, I tend to agree with you regarding the oversimplification of the WPG rule. However, given that you're going low light and have chosen low light plants, you could give 15 watts a shot. Will 26 watts be the death of your tank? No way. You'll probably see much better growth. However, I do think that 26 watts is probably medium light for a 5.5 gallon.
Last edited by FrostyNYC; 06-07-2008 at 04:01 PM.