Description: Calcium Hydroxide (Kalkwasser Powder) 4 lbs. E.S.V. Calcium Hydroxide (Kalkwasser Powder) is a tried and true method to maintain proper calcium and pH levels in reef aquaria. Mix with fresh water and add as needed to top off the aquarium for evaporation.

Shipping Weight: 4.9 Lbs.

Product SKU: AD-ES102