I use this 3M cleaning padto clean my Acrylic tank. it can also polishes the acrylic. It is effective with hard green spot algae. has no chemicals and no abrasive but avoid touching the substrate and wipe all snails off of the glass before you scrub. If a pond snil or sand from substrate gets on the pad it will scratch the acrylic. I also use this in my filter. it is effective at removing debriis and clearing green water.
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