Treats a wide variety of parasitic diseases including velvet, fish lice, hole-in-the-head disease (Hexamita spp. & Spironucleus), gill & skin flukes (Dactylogyrus & Gyrodactylus ). For use in both freshwater and saltwater aquariums. This medication will not color the aquarium water. Directions for Use (Packets): For best results, remove activated carbon or filter cartridge from filter and continue aerations. For each 10 gallons (38 L) of water, empty one packet directly into aquarium. Repeat dose after 48 hours. Wait another 48 hours then change 25% of the aquarium water and add fresh activated carbon or replace filter cartridge. Directions for Use (Bulk): For best results, remove activated carbon or filter cartridge from filter and continue aeration. For each 20 gallons (75 L) of water add 1 scoop (1 tsp.). For larger systems, for each 240 gallons (908 L) of water add 12 scoops (4 Tbsp.), or for each 960 gallons (3,634 L) of water add one cup. Repeat dose after 48 hours. Wait another 48 hours then change 25% of the aquarium water and add API BIO-CHEM ZORB, fresh activated carbon, or replace filter cartridge. Will not discolor water. Safe for use with live plants. Size: 10 pack
