Review on Marineland White Diamond 50 oz - High-Efficiency Ammonia Remover for Aquarium Filters by Lisa Hill

I filtered 125 gallons at 200 GPH, I filled a large ziplock bag 2 with a quarter cup of white diamond crystals. I took a small 3 gallon bucket and washed off the dust with reverse osmosis water without the faucet. You don't want him to start cleaning when he's not even in the tank system. I think I washed the dust 4-5 times until the water was slightly dusty. If you want, you can rinse it clear. While using the RO I left it in the filter for 2 hours. My photos are only hours and I deleted media as instructed. It's definitely a replacement part, I'm amazed at how easy it was. This product is for freshwater only and works like a charm. Stock up if you have 65 gallons or more, I bought three and they make two bags in a 125 gallon container. Of course, depending on the ammonia level, I use a sump so I don't have to add water and clean as often.