Actinics?

[Samw]

In the past, I have measured the dissolved oxygen level of my water with no lighting and then with only 96W of actinic light for an hour and the oxygen meter showed a 0% increase in oxygen. However, as soon as I turned on my regular PC bulb or my MH bulb, oxygen levels increased significantly within the hour. If the byproduct of photosynthesis is oxygen, then one might conclude that a 96W actinic PC bulb resulted in little or no photosynthesis.

[mark]

Actinics are for your benefit, not the coral and the fish.

Currently have actinics only (2x54W T5) along with 2x250W 14k Hamilton's and things definitely fluoresce, even with the MH on.

One thing though, before I had the T5s ran 2x40W NO fluorescents (one 50/50 other actinic) for dusk/dawn. Do have to say, still prefer that combo of softer white light more than the purple glow of the actinics only with the MH off. I've got another T5 set with 10k (2x54W) yet to put in, though thinking even a smaller CF might be enough to get some white back into the mix. Wouldn't want to give up the effect I get with the 2 T5 actinic though.

[Mik_101]

danm i cant have the tank because of space issues