I have film on the surface of the water. I use a lily pipe return, and pressurized CO2. Is this something i need to deal with or should i just let it be?
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I think that's a fleeting solution though, and not as good as something to deal with it consistently and prevent it from accumulating in the first place.Wood, tree leaves, and fish food are potential sources of oily film. I use paper towels to remove it. Lay the paper towel across one end of the tank and drag it across the surface toward the other end. Have a bucket or plastic shoebox waiting to drop it into.
Very true, but "fleeting solutions" can be useful in emergencies, like a power outage.I think that's a fleeting solution though, and not as good as something to deal with it consistently and prevent it from accumulating in the first place.
The Eheim is my favorite method too, and it will also clear a tank of duckweed!IMO, removing the surface scum is a virtually a REQUIREMENT. As mentioned already, it inhibits gas exchange. That's a problem for your filter bacteria and everything else. If you're adding co2, it can trap excess. I now use the Eheim Skim 350 and though I have to clean it weekly, I like it a lot.
I have a skim350 and it poses a serious risk to fish and shrimps. Within a few hours' use, one of my Corydoras habrosus got sucked into it. I made a guard that prevents this happening. But, on a positive note, the skim350 can do an effective job, albeit fiddly to optimize the flow.You could always use this.