I setup a 3g pico tank about a year ago and I am very happy with the way everything is going so far except for one thing. I can not get rid of the white film on the surface of the tank which I assume is the byproduct of organic waste. All my corals are doing great and growing fast. I add about 1 coral a month and so far my tank has 2 small zoa's, 3 mushroom colonies, 1 leather coral, 2 small turbo snails, 1 hermit crab, bali starfish and no fish. So I dont think that I am overloading the tank.
I do regular water changes (1g/every 3-4 days), change my filter media every 2 weeks. I also started using active carbon which I hope will help with the issue. I have my powerhead directed at the surface. So I think I am doing everything right and yet I am still having the issue. I know that some might people think adding a skimmer is the solution but wouldn't it be an overkill for a 3g tank? Wont it take out all of the minerals from the water? Any ideas?