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Darlene4238
Help solve the problem: dirt (brown fluff and white powder) accumulates on the stones and in some places on the sand. The aquarium has a pump: 3000L, 1500L, and two standard ones of 500L each. Theoretically, all this dirt shouldn't settle on the bottom and the stones. After I clean the stones and blow off the fluff, in three days there is the same layer again... Why is this happening???