FINFISH
Premium Member
I've got a 250watt 10k DE HQI lamp with two 24"T5s (blu, blu+). The tank depth is 24" (36longx24w) and the lamps are about 6-8" above the water. The tank seems overly bright. I have five crocea clams, and if anything- they seem to be losing some of there color, but doing well otherwise. (the clams are between 6-8" off bottom). I don't feed the tank- and the oldest clam is about 6months (~5"). All WQ parameters are in desirable range for clams. Any thoughts on the effectiveness of this set-up? And why the clams are fading to brown?