Coral metabolism vs. light par

[Myka]

I see it is a 55g cube, what size dimensions does that make? 24x24x22"? That's an awful large amount of light over that tank!! I would think that lower the PAR in your case may help. If that is the case, maybe you will want to consider selling the 400w, and changing to a 250w so you can pick a better bulb color (I dunno, maybe you like 20K, but I think it looks terrible), and save on electricity.

That doesn't sound like a huge amount of 2-part to me. If you plan to upgrade your dosing methods, I would suggest a dosing machine instead of a calcium reactor as the reactors are getting kind of out-dated. Dosers take up less room, are usually about the same price, and are easy to dial in.

I would imagine that increased PAR would increase photosynthesis (not necessarily growth), and would then need more nutrients. However, I'm only taking an educated guess here. I'm not sure.