FISH EDTA Aquaculture Water Treatment Chemicals is a water softener which is applied to pond water for maintaining pH level and reducing water hardness. It is also appreciated for having ability to chelate metal deposit over shrimp shells. EDTA is main ingredient in this chemical which works by binding to heavy metals including calcium & iron and stopping their activity. FISH EDTA Aquaculture Water Treatment Chemicals can also improve water purity and make it completely suitable for healthy, disease free, and strong growth.