It is suitable for both indoors and outdoors usage as it is specially designed to work effectively in various filtration systems such as pond filters, overhead filter, canister filters, wet and dry tricking Filters, internal and external overflew systems etc.

• Effectively increase the amount of oxyen dissolved in water.
• Removal of ammonia, nitrite, hydrogen sulfide, heavy metals and other harmful substances.
• High efficiency and clean water quality
• Stability of PH value in the water, especially the use of nitrification bacteria attachment, parasitic, reproduce and maintain the best ecological balance of water.
• Easy manitenance
• Clarify your water naturally
• Extremely porous ceramic media for efficient biological filtration.
• Clarify your water naturally and cultivate beneficial bacteria with these porous ceramic media.

Each block measures 6.1″ long, 1.6″ diameter, approx 90 -100 grams.
crack into pieces to any size needed, great for used in freshwater aquariums, planted aquariums, sumps and ponds.