Wondering about pool reverse osmosis cost? While reverse osmosis may seem like an added expense, it often saves pool owners thousands by preventing scale buildup, equipment damage, excessive chemical use, and costly drain-and-refill cycles. Pool reverse osmosis restores water quality by removing calcium, TDS, and contaminants—extending the life of your pool and equipment while conserving water. In many cases, the cost of pool reverse osmosis is far less than the hidden costs of neglecting bad pool water.