cyanobacteria - how to remove it?

[glarior]

I would add more circulation in the tank. You can also use a turkey baster to keep the corals clean. Have you tested your water for phosphates and nitrate? WCs if these are high. The phosban you have already added will help with the phosphates, but do WCs for the nitrates. Once these are in control though, you don't want to do a lot of water changes, or you are introducing stuff for the cyano to feed on again. What do you have in the fuge? Make sure it is a fast growing macro algae like chaeto. And how long has it been since you changed out the lights? The macro algae should double in size about every month. If it isn't, you need a new bulb or additional light on it.

What would you recommend to circulate the water? The power head I bought I don't really like. Can't think of the brand right now.

Not using a turkey baster just tiny tube and siphon the cyano off.

I will test tonight.

Fuge has macro algae which is growing back. The old light literally fell apart and by the time I was able to replace it the algae started to die and was being sucked into the pump. Right now its growing again and getting biggger.

I have never changed the metal halide bulbs for over a year. I bought a new 48" light which should arrive this week. It has 2x250w 15000k metal halide, 4x 65w ancetic blue bulbs.

Also the chem bag I put in the sump is Chemipure.