I decided to use this thing that I am pretty sure is quilt batting. I've read many articles/forums where people use this quilt batting. My water is slightly colored, and if it clears in the morning (9 hours from now), then it probably works.
Also, this question is slightly off topic. When I turn my light on, only one fish starts swimming against one wall. I think there is a reflection, but its been rubbing its face against it up and down for hours. Any thoughts?
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