Check the listing for details. Poolmaster 23243 1oz. OTO Indicator Replacement Solution. Condition: New. Listed at 11.69 USD. Poolmaster 23243 1oz. OTO Indicator Replacement Solution PRODUCT DETAILS: For maintaining your pool or spa's water chemistry, Poolmaster's replacement solutions are the perfect choice. Features: For maintaining proper water chemistry^1oz.. OTO indicator solution PAYMENT SHIPPING RETURNS We only accept payment through PayPal. This is to ensure that all of our buyers qualify for eBay Buyer Protection. Most orders are shipped within 1-2 business days with standard shipping and tracking. A tracking number will be posted as soon as the item has shipped. Please make sure to provide the correct shipping address during checkout as the address cannot be changed afterwards. We are not responsible for any incorrect or undeliverable addresses. We do not ship to PO/APO Boxes. We offer easy returns on most items within 30 days of delivery for a full refund.