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what is this? and how to get rid of it?

13 years ago

Hi all, I have two tubs in which I grow miniature lotuses. One tub I had for 2 years, although i had no blooms, the water was always clear. This year I started a tub with some of my old lotus from the other tub into the new one. The new tub had this over on the top. Due to contamination from me , now both tubs have this on the surface. The lotus leaves seem to be healthy. But i would like to know what is this and how worried I should be.

Thanks for the input.





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