crystalline compounds formed in swimming pool and spa water when the calcium, pH and total alkalinity levels are too high; once formed, the crystals adhere to the plumbing, equipment, pool walls and bottom; these crystals are better known as scale
crystalline compounds formed in swimming pool and spa water when the calcium, pH and total alkalinity levels are too high; once formed, the crystals adhere to the plumbing, equipment, pool walls and bottom; these crystals are better known as scale
