Stubborn Surface Film - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 02-12-2020, 03:59 AM Thread Starter
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Question Stubborn Surface Film

I have a 2.5G with some stubborn surface film, it has been progressively getting worse it even came back this time heavily after a single water change. The tank is only maybe 5 weeks old but planted well with almost non existent nitrates so I got some die off. Could this be food related or plant decay related? Yes I do have a low flow filter due to my Betta and I know that is everyone's first question, but I took a filter meant for a 10 gallon and cranked it to its lowest setting then put a reducer in the intake tube to reduce the flow for a 2.5G tank or comparable to the filter that came with the tank. It just holds more media and has a wider surface area outflow.



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post #2 of 6 (permalink) Old 02-12-2020, 11:52 AM
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Is your tank fully cycled and all water parameters in check? Any chance it could be from hand lotion when reaching in the tank or something leaching off the substrate or decorations?

Try scooping it out with a fine mesh net or soaking up with a paper towel and see how quickly it comes back. Also try your next couple water changes with remineralized RO water to rule out something in your water source causing this.
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post #3 of 6 (permalink) Old 02-14-2020, 11:09 PM
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Dealing with that oily biofilm too, I'm not too worried, it's still a new tank (mines also around 5-6weeks). I have a sponge filter but the surface agitation is blocked by foam floating ontop for some emergent plants. Again not to worried, if I wanted I could throw in a few "pest snails". They'll cruse upside down at the surface munching that oily looking film off ^^
You can increase flow and aim it at the closest wall of the tank to baffle current but allow for more surface agitation. If your betta is a female or a plakat (shirt finned) they can tolerate a little more flow. Or just toss in a it stone/air pump.

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post #4 of 6 (permalink) Old 02-14-2020, 11:23 PM
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I’d build a outflow ramp so that waterflow comes out going more across surface in a rippling surface movement to breakup film and pull it down into water.
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post #5 of 6 (permalink) Old 02-15-2020, 01:10 AM
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Step 1: Paper towel to the rescue.

Step 2: Do what @DaveKS suggests. Just getting more surface agitation would likely eliminate most of the film over time.

What kind of filter is that? Solution is probably something as simple as just clipping a small piece of plastic to obstruct a bit of the outflow, redirecting water across the surface.


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post #6 of 6 (permalink) Old 02-15-2020, 01:56 AM
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Thinking on this.

Style: Organic potting soil, sand, gravel, wood, plants, moss, snails, shrimp, small fish, dual siestas
Tech : Small tanks, Fluval Plant 3.0 Nano, Top Fin MF10, Eheim Skim 350, Tunze 3161, Neptune Apex EL
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Last edited by Streetwise; 02-15-2020 at 05:23 AM. Reason: Edit
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