Review on 💧 Seachem PhosGuard 500ml: Powerful Phosphate Remover for Crystal Clear Aquarium Water by Anna Crane

Works great. My phosphate levels were so high that I had to test in the high range. Even after a 20% water change. I whispered this into a filament filter (I only use it for water flow and extra charcoal. 55 gallon reef tank here) and my phosphate levels dropped to a low test level in 3 days. I took it out and replaced fresh after 4 days but this time I mixed it in half with Seachem Carbon Matrix which is the same size and shape as this one. I actually had to take it out after another week. My phosphate was not tested at all and 0 phosphate is bad for coral. I think if I were to complain I would say look at your levels, it worked too well for me.