Review on Brightwell Aquatics Xport PO4 Cubes - High-Porosity Media for Efficient Phosphate & Silicate Removal in Pond, Freshwater & Marine Aquariums by Amy Padilla

I bought this product at my local water supply store. I first lowered my phosphates with Rowa Phos which works GREAT and very fast to lower them to an acceptable level, then I bought a pack of Brightwell Aquatics PO4 Cubes because I was told they are the best product and need to be replaced at longer intervals. Long story short they didn't work, my phosphate levels started going up right away so I gave it a few days to see if it settled down and did its job, no luck the phosphate was back to 0 ,58. I have now used Rowa phos again and halved the phosphate overnight. Maybe I have a bad bag or something but based on my first experience with this product I wouldn't recommend it for anything else.