Originally Posted by Madreefer420
I find I get bleaching a lot and that red **** on my sand I thought its cause it had to much red spectrum
Red spectrum is a result of old bulbs. The res stuff your referring to sounds like cyanobacteria, and it has nothing to do with lighting as it is a bacteria. Cyano
is caused from excess nutrients.
The bleaching could be a number of things most notably water quality and amount of light. Color temp of 10k-20k does not cause this. Can be proven by the fact most people run 10-14k bulbs, not 20k.
20k is a specialty lighting often used in frag setups as 20k will bring out colors and really cause the corals to become fluorescent. Many times you will see frags that you buy for sale under 20k lighting. 10k will give best growth but it also a very white light so many people use 14k to through more blue and color into our tanks.
29g Mixed Reef, 150w 14k Phoenix MH w/ Moonlights, Reef Octopus BH1000 HOB Skimmer, Ecotech Vortech MP10es, ReefKeeper Lite (Plus), PH Probe, Temp Probe, ATO, Carbon/GFO Reactor.