Review on 💧 Seachem Matrix Carbon 500ml: Powerful Water Purifying Solution by Kelli Grossi

Whilst it is not the cheapest choice of activated charcoal I find it to be the best choice and all I will be using in my reef system is the lowest phosphorus content of any carbon. , the lance shape ensures a better flow and a larger surface, also due to the spherical shape. Keeps my water pristine and crack-proof, I like to change every 2 weeks as I feel like it can still work in my 100 gallons, it's basically depleted.