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Fancy-Cup6393 posted on r/aquarium2w
I battled this crap for months a few years ago...my local fish shop recommened i use Excel Flourish daily to combat it. No idea why or how, but it absolutly decimated all of it without harming anything in my tank. https://www.amazon.com/Seachem-67104530-Flourish-Excel-500ml/dp/B000256962