Film on top of water

[jw1977]

I've noticed a film on the top of my water. I've been battling a cyanobacteria problem that i can't seem to get rid of. I've started feeding every other day and it helped for a few weeks but the cyano has returned. I have a 46 gal tank with emperror 400 filter, skimmer, 2 Koralia 2's. What is this film? It looks like like it's cyano.

 

[meowzer]

You probably need more surface flow

 

[alabama reefer]

Surface flow will push it around but it sounds more like you are not getting enough overflow. No it is not cyano on top of the water.

 

[michelleolds]

try more surface agitation and surface skimmer. I get a film every once in a while too. I don't know what it's from, but it goes away by itself after a week or two.

 

[canareef]

I was told the scum is a build up of protien. If what I have been told is true then water changes and a good skimmer should help. Also keep the surface moving add another power head or redirect one you already have to agitate the water surface. You have a cyano problem and a build up of protien on your water surface it sounds like you have a nutrient problem. Could be caused by overfeeding or lack of filtration and defiately a lack of water movement. How much live rock and how deep of a sand bed do you have is it sand or crushed coral and what is your stock list? What do you feed and how much?