I placed an order for 3 in Chlorine tabs on May 5th 2021 and order was accepted and charge was placed against my credit card. 14 May I receive an email stating order was cancelled. No explanation, no offer of substitution, no anything!. If I could give less than 1 star I would! Pool Supply World will see no more business traffic from me! Do yourself a favor and find another supplier for your pool needs.