Aquarium & Terrarium Gravel & Substrate HYDOR

High quality natural zeolite ideal for fresh and marine water tanks. Fast adsorbing action for crystal clear and transparent water. High filtering capacity, removes pollutants and dyes from the aquarium and absorbs toxic ammonia. Also useful for eliminating drug residues or microalgae. Excellent as a biological substrate to promote the proliferation of aerobic and anaerobic bacteria. Ion exchange reduces the ammonia content. Mechanical filtration for food and faeces. It does not release phosphates, heavy metals or other substances harmful to the life of fish or corals. Wash before use with distilled water. Pack of 550 g with convenient filter bag included: the bag allows you to keep the

Sintered quartz rings indicated as a biological substrate for marine and freshwater aquariums. They favor the development of beneficial bacterial colonies in the large available surface, allow the elimination of toxic ammonia. They do not release phosphates, heavy metals or other substances harmful to the life of the fish, they maintain the pH of the aquarium unchanged.450 g pack for great versatility of use. The rings can be inserted into the internal or external filters inside the special biological compartments. | Hydor Rings in Sintered Quartz BIO-RINGS for Organic Substrate, Fresh and Marine Water, White

High quality activated carbon with low ash content, adsorbing action for crystal clear and odor-free water. Ideal for freshwater aquariums. Quickly removes dyes and pollutants from the aquarium while maintaining the pH, useful for eliminating drug residues or microalgae. It does not release phosphates, heavy metals or other substances harmful to fish life. Pack with 3 convenient bags of 100 g each: the bags allow to maintain the properties of the product unaltered and enable great versatility of use. | Hydor Activated Carbon for Freshwater Aquariums, Adsorbent, Reduces Odors, 0.9 lbs