Check the listing for details. Baquacil CDX 1/2 Gallon Bottle - 4 Pack. Condition: New. Listed at 199.96 USD. The Baquacil CDX System is an enhanced chlorine-free system specially formulated to maintain a consistent oxidizer residual in pool water. The oxidizer residual in pool water plays a significant role in removing contaminants that put a strain on the pool and keeping the pool clear all season long. Step 1: Sanitize with Baquacil Sanitizer & Algistat Step 2: Oxidize with Baquacil Shock & Oxidizer Step 3: Maintain oxidizer residual and water clarity with Baquacil CDX For areas where algae problems are prevalent or in pools with a history of recurring algae, a preventative dose of Baquacil Algaecide or Baquacil Performance Algaecide may be added to the weekly CDX Maintenance System during the hottest months of the summer. Be sure to follow label directions for dosage recommendations. Come on in and experience all the pleasures of chlorine-free swimming. With the Baquacil Pool Care System, you’ll enjoy all the fun your pool has to offer. The chlorine-free formulation is gentle and nonirritating to eyes and skin, and gentle on swimsuits and pool liners. Baquacil's stability gives you peace of mind because you get more dependable, consistent bacteria control and more time to enjoy fun in the water with your family.