Creates the perfect bio home for bacteria, porous inert structure designed to maximise bacteria colonies and remove Ammonia and Nitrite.

Provides deep anaerobic zones for de-nitrification and is a great substitute for live rock among reef hobbyists. Perfect for use in sumps and stacked in extra-large filters. Porous inside and out and will not affect pH. 

Comes in a handy ziplock mesh bag for easy placement and removal in any filter system. 

We tested this product and found it to be very porous and effective so why pay big bucks for expensive brands?, cheap from us because we bought bulk and wanted to pass the savings on to you. 

Can be used in:-

• Tanks
• Sumps
• Canister filters
• DIY filters
• Trickle or shower filters
• Waterfall filters
• Hang on back filters