ST International Diamond Tap Water Dechlorinator ST ARiSEN Diamond is the HIGHEST concentrated Tap Water Conditioner on the Market! ST ARiSEN Diamond can make tap water INSTANTLY safe for aquatic life by removing chlorine, chloramine, ammonia, nitrite, and heavy metals! PROMOTES slime coat production! Every 500mL bottle treats 6,000 gallons of water! Also available in 100mL (3.4 fl oz), 250mL (8 fl oz), 4000mL (1 US Gal.). See Product Description for details! Excellent for BOTH Fresh Water and Salt Water aquariums!