<a href=showthread.php?s=&postid=7242896#post7242896 target=_blank>Originally posted</a> by Briney Dave
clearly correct, I was working on the assumption that water changes were not being done at the correct level or that the skimmer was either too small or not functioning correctly.
Phosphates and nitrates combine to allow algeas to run amuck (especially hairs)
what I did not notice is how much live rock is present and if there is a refu on the system along with the bottom substrate. too large of substrate particles can be a nutrient trap, along with bio-balls in a filtering system also trap nutrients. also on my mind is the type of lighting, the age of the bulbs, and the photo-period.
1.5-2 lbs of live rock per gallon, 4-6 inches of very fine grain sand bed, bulbs under 8 months of age and of a temperature range that does not promote algae i.e. 10,000 K or higher
needed is propper water movement, skimming and water changes plus putting back water free of the above to limiting nutrients is the way to prevent the spread. (R/O)
the cleaning crew keeps up with what the live rock bacteria allows to pass. overall a balance between what is being produced and decomposed needs to be reached.
in a nut shell cut the photo day down for a few weeks to six hours or so, watch how much food you are feeding the fish, cut it down if possible and avoid the flakes if possible.
water change once a week of at least 10% with r/0 water
look for other sources of nutrient traps such as the gravel being too course, having bio balls etc.
make sure the lights are propper for a reef tank and not too old
make sure that there is enough water movement through the tank and no dead spots. The surface should be in constant motion.
the cleaning crew will help to maintain the balance not solve a problem. These creatures work with the bacteria of the sand and live rock to control. The front line is the bacteria breaking down the nutrients, the cleaning crew keeps back and little bits that would remain
there are many good articles around the r/c and many much more qualified to speak on this subject than I but I think I am pointing you in the right direction
sorry I was too brief before I assume too much some times
your pal
Briney