Check the listing for details. Sirona Spa Care Simply Oxidizer - 2 Pack. Condition: New. Listed at 43.98 USD. Sirona Spa Care Simply Oxidizer, the second phase of the Sirona Spa Care Simply 3-Step System, is a hydrogen peroxide-based solution designed to effectively maintain the sparkling clarity of spa water. Employ this oxidizer to aid in the maintenance of a clean and clear spa. Product Features: Breaks down and removes oils and organics in your spa water using 7.5% stabilized hydrogen peroxide Add to spa water at start-up and keep adding weekly to prevent buildup of oils and organic materials Use with Simply Waterline Control and Simply Sanitizer to create healthy, healing spa water Simply Oxidizer is compatible with biguanide sanitizers Sirona Simply. The bromine-free, chlorine-free biguanide solution. Start Up Directions: Add 3 ounces of Sirona Spa Care Simply Oxidizer per 150 gallons of spa water. Be sure to wipe with a clean, damp cloth any excess product that drips down the side of the bottle. Circulate water for a minimum of 15 minutes. Maintenance Directions: Once a week, add 1.5 - 3 fl oz (depending on spa usage) of Baqua Spa Oxidizer per 150 gallons of spa water. Be sure to wipe with a clean, damp cloth any excess product that drips down the side of the bottle. Circulate water for a minimum of 15 minutes.