Pond scum!

[bmcduffy]

Can anyone help me get the "pond scum" off the surface of my tank?
After 8 years with a Oceanic 29g cube, I went with a 65g acrylic about a month ago. Everything is thriving and the water is gorgeous until I look up at the surface. Here is the tank in a nutshell:
Closed loop with 2 drains and 2 returns in the bottom
No Sump
1000gph pump for the closed loop
Lifeguard aquatics filter and UV light in the loop
Huge Remora C hang on back skimmer with in tank overflow box
(the overflow box hooked to the skimmer is always full to the top, no trickle)
1 pretty big Koralia at other end breaking the water surface
Thanks in advance for any help you can offer. I can't find the answer anywhere.

 

[Russellaqua]

Can you post a picture of it? I'm having a hard time picturing it in my head. Is it an oily sheen on the water or a floating algae?

 

[Whys Alives]

Without an overflow it can be pretty hard to skim the surface. Some HOB skimmers and filters claim to, but some do a better job than others, and none do the job perfectly. Typically the advice is to point a power head directly at the surface to break up the scum.

This is why an overflow to the sump is nice.

 

[bmcduffy]

Thank you!

 

[FX CharityCorals Verified Sponsor]

Have that overflow box trickle down a little instead of being all the way full. That will skim the surface some. The other remedy would be a lot of surface agitation so proteins and fats don't gather as much.