…film, how do I shift it? the film is almost like tracing paper. have tried to drain the top level, running newspaper over surface to collect the film, but no success. What has caused it and how do I get rid of it?
Did you add a water conditioner after you refilled the pond? Some of these leave a residue.
By cleaning, I hope you only meant that you drained it to remove debris from the pond, and that you didn’t use any cleaning products (no soap should be used). When the water level was lowered, you might have disturbed a pocket of decaying leaves from pond plants or fish wastes. The decomposing material can leave an organic film of dissolved proteins and bacteria which feed on it. I tended to get this in a tank of catfish I have, and found a surface skimmer that attaches to an aquarium filter that got rid of it by drawing water off the surface: http://www.thatpetplace.com/pet/group/10591/product.web You might be able to attach something like this to your pond’s filter with a PVC adapter.
Probably the best way to get rid of the stuff is to overflow the pond. If that doesn’t work get some form of aerator and break it up with water flow(like a fountain) and it will eventually go away.
The film was probably caused by the water treatment(dechlorinator) used to remove the chloramines. One other possibility is that it came from the organic “stuff” at the bottom of the pond. In either case water circulation and time should take care of the problem.
Good luck.
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