here i go again i posted in the wrong place sorry

[greenvillecoins]

i have this brown looks like cottage cheese, on my power heads and the magnum cannister filter lines and in the cannister lines if i touch it it flys everywere....i havent changed the filter this month yet, but started when i added the lobo coral....im really confused... and one last question at what angle should my two power heads be pointing at? i have a film on the top of my water i have them crisscros now both on back of tank but it looks like its to much wave for the corals..as you can see one pod of the lobo dyed and was eaten, it looks like its in distress to me,,?..thanks for any info you can help me with ken

[bertoni]

I might have answered some of these questions in your other thread, but I would point the powerheads up enough to get a good rippling on the surface, but not at any individual corner. Other than that, you could look to see whether there are any dead spots.