I assumed a previous comment of $30 meant $30 per roll. My mistake. Unfortunately many report that they might need 2 rolls a month. Either way... My point stands. It's very pricey when alternatives are still as effective. Not to mention many people don't even like using filter socks if they have other means for nutrient export.
Most people only report the negative , for me it would cost me under 168 bucks a year my roll last almost 6 weeks ..
Do once every 5 1/2 to 6 weeks I’m changing a fleece I’ll take that any day of the week the more I keep my hands off my tank the better it is [emoji1]