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green coloured froth-like surface
Recently I posted a question regarding scum on the surface of my tank....no
answers yet but I have new evidence... I have left it for a whole weekend - when I got back the surface was covered with a fine green dust. It had bubbles on it which resembled a scum or froth of sorts. When I dipped my finger in, the scum closed around it, when retracted there was no evidence that I had distured the surface. It left a very fine green film on my finger which resembled dust and rubbed off between my fingers - it looked like powder and not blue-green algae. It's the sort of scum that you find on stagnant ponds or water that has been left for an awful long time. Does anyone know what it is.... I have just put my venturi jet back on and directed it at the surface... The Chemistry of the tank is fine everything 0 or normal. I do use CO2 injection, I perhaps do not have the amount of plants I would like to have at the moment. Light is ot too strong 2x20W tritons and 1x30W flora glo. Filter is Ehein turning over 660lph on a 250l tank. I have just been rearranging the outlet once again to try and get as much free floating rubish out as possible. I do have riccia fluitans on the surface and some ceratophylim demersum - these have both been removed now as I am thinking on the lines that the surface plants are producing spores which are then breeding ??? Any suggesstions would be a great help. Thanks Martin |
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