i have a bgkf a chinese algae eater and 2 angelifshes in a planted 50 gallon tank! 1 week ago the water has started to being blur, and a strange liquid like "white oil" is on its surface... does anyone knows what is happening? ... thanks!
hm... i did it but there wasnt any difference (sorry, i dont the best english)! the water is blurry when i look it through the glasses (in front of) and the white oil appears when i look it from above!! do you know what is happening? thanks
The surface film is a protein scum. It is caused by organics, and can occur from time to time. I see it minimally in a couple of my tanks, never in others. Regular partial water changes of 50% weekly, good filtration, not overfeeding, and not overloading the fish load all work to keep it minimal or non-existent. When you do the water change, invert the siphon and remove it; this will at least keep it less. Water movement at the surface also helps to keep it from forming, the filter flow directed across the surface, or with a surface skimmer attachment to the filter, depending upon the type, will all help too.
As for the cloudiness, that is likely a bacterial bloom. Same "treatments" as those mentioned above. Plus good vacuuming of the substrate during water changes (not around plants though).
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