For small to medium spas Hot Tub Calcium Hardness Remover A simple way to reduce the calcium hardness level in your hot tub Simply rinse through, drop in over your drain or suction, flip after 12 hours and then remove 12 hours later Vanishing Act calcium remover is extremely useful if you have water with high levels of calcium hardness or metal content that can often complicate the balancing process. Rinse well before use. Do not leave bag inside of water for more than 24hr. Single use only – dispose after use.
