T5 bulb combinations

[fishytime]

Originally Posted by chris88

I hounestly don't think you are going to see any difference in growth rate and you are probably going to get poor coloring. The par on those bulbs are the same. Corals use blue and red spectrum for photsynthesis and you have just added a bunch of green and yellow which corals do not use for photosynthesis very well. if you wanted increased growth you should have just feed more. or increased overall par.

whats the spectrum of natural sunlight?

[chris88]

please dont make me post another graph showing the actual spectrum of photosynthesis, i have posted it multiple times on this site showing at what spectrum corals photosynthesize at. most of natural sunlight dose not penetrate down very far and reds, yellows, and greens are quickly absorbed and do not even reach the corals. trees use sunlight to and they do not use green light either for photosyntheis, they reflect it. same deal with corals.