Review on 🔄 Renew, 4 Liters / 1 Gallon by Mandy Jones

I've been using it for some time instead of my old replacement activated carbon in my freshwater aquariums. Chemicals are much less likely to get back into the water if you leave it in the filter for too long. While not cheap, I have found that this material can last me about twice as long as the same amount of charcoal before requiring replacement. (3-8 weeks vs. 1-4 weeks depending on fish population)