here is my problem

[Doug]

Yes, agreed Brad. The second 400 would be better. However a pair of Sunbursts cost about $250/year Canadian. It was remarkable how well his corals looked under the single 400 {and a low par bulb to boot}, on such a big tank.

Another problem here, as mentioned before by Mike, is evaporation and humidity. To much is hard on Mike,s son. Although the room does need to be better vented, we were wondering if the cooler vho,s would take less cooling fans, thus less evaporation. A pair of 400,s under that hood would require more.

Of course the big question is, if the 440watts of vho and a couple normal output actinics, will be enough for soft corals in that particular tank.

Of course if he has to downsize because of the humidity, then its a mute point. Mind you the vho,s would be great over a standard 55 or 70gal tank for most any corals.