Review on 🐠 50 Ounces of Marineland Diamond Blend: Ammonia-Neutralizing Zeolite and Carbon Aquarium Filter Media by Justin Jefferson

Whenever the ammonia level in the tank goes up I change the carbon/zeolite and bam it goes back to 0. These things really work. I put about 5 tablespoons at the bottom of a canister filter mixed with ceramic filter media and lava rock and it all works great together. The effect of the carbon/zeolite crystals lasts about 6-8 weeks in my setup. The water is crystal clear and the ammonia level is 0. I wasn't sure if I bought that much straight away but it was actually a good purchase and I look forward to having this stuff for 6 years! Good stones have no expiry date!