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Wierd film on top water of tank?

833 Views 8 Replies 8 Participants Last post by  shoteh
Ok so i dont have my camera or i definately would post some pics of this. I came home tonight to see a thick white stringy type film on the top of the water. I took a fish net and netted some out but the rest is floating and cruising around the tank. Does anyone have any idea what this is and what i can do to get ride of it forever?
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Are you running diy co2?

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Normally I would say biofilm but your description of "thick white stringy" sounds a bit odd. Unless it is just being pushed by the current to one area and smooshing onto itself.

Run an air stone for a spell to create more surface movement to break it up. I normally run one at night. If I don't run it for a few days, I get the film on top as well.
I also vote for biofilm or surface scum as well. Good filter or aeration usually removes it for me.
had a similar issue in my tank. I added sand and had a water pump below the water line and it was instant funk, added a HOB filter for surface movement... Bam, funk gone...

Though your description sounds like a DIY co2 issue.
Place a jet just below the surface for surface agitation? Add a carbon layer to the filter?
The above also removed oils from the surface.
I've found a skimmer to be too big for my 10 gallon and my AquaClear20 was not strong enough to pull the skimmer but maybe you might have better result with a more powerful filter. Also skimmer defeats the purpose of a silent setup IMO.
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