foam like bubbles forming around edges tank.

[Chris6]

I have had my tank set up and running for approx 4.5 months. I am running it all natural with only a power head and live rock for filtration. I have very little live stock and feed very little. I change approx 25% water every 5 days or so. Recently I have noticed foam like bubbles forming against glass edges on surface of water. They seam to come back within a day or two after wiping them away during water change. They seem to be more than just air bubbles. Do I need a protein skimmer or something? I really Dont want a bunch of bulky equipment I have to plug in.

[CJJon]

Sounds normal to me with such a young tank. Sine you don't surface skim, make sure that the power head agitates the surface water well. It should be roiling. This may also cause the foaming you see at the edges. Similar to foam fractioning (skimming).

 

Yes, a skimmer would help, but I think more or different surface movement might too.

[reefernanoman]

Yeah, I had the same issue with my tank when I didn't have a way to skimm the surface. An AC 50 with a Pico AC surface skimmer did the trick.