<a href=showthread.php?s=&postid=6544453#post6544453 target=_blank>Originally posted</a> by gillies
I can't resist trying to figure out the Algae issue. I switched from PCs to Halides about nine months ago. I am running DE 250w Ushio 10k like you were. With PCs, I never had algae problems. With the Halides, I'm always chasing after several types of algae. Would switching to a higher K bulb make the difference as you have suggested? I am thinking of Phoenix 14k. Anyone else ever experienced this?