Dymax Pro-Lite 12pcs/box

• For freshwater and saltwater aquarium and pond use
• Helps remove ammonia, nitrite and nitrate
• Suitable for trickle, canister, sump and top filters
• Highly penetrative porous structure
• Provide primitive living environment for micro organisms
• Box of 12, each block 150mm x 5mm x 15mm hole
• 1 Box treats up to 1000L