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cassklar
01/14/2011, 09:11 PM
I am wondering if I have to much light and if I do how can I reduce it without buying another fixture I have a 37 gallon tank dimensions 30x 12 x 23 my lights are two 150 watt mh with four t5 bulbs that are all blue is this two much light I am growing zoas soft corals and some chalices so far so good but some of my favia is losing its color your advice is appreciated

Felixc395
01/14/2011, 11:05 PM
I'd have to say you have way too much. The four T5's alone would be fine to keep the corals you listed, with the two MH this seems like overkill. If your corals are doing ok, then everything's good. When you say lose color, do you mean turn brown or white which could indicate nutrients or bleaching. If you believe you have too much, raise the fixture higher if possible and/or shorten your photoperiod.