Update-----Yesterday, I went to the LFS and got a bunch of chaeto and put back in my refugium. After the water flows from the refugium, I put some nitrate remover (Kent's) and some Phosphate remover (Dr G's) for the water to flow through before it goes into the skimmer and back into the tank. Hopefully, this will help. Also, my MH lights are on from 9-4. Is this too long? The actinics are on from 830 to 430. Should I cut some time off?