I sent a message to you on 8/25, no response. I would like to return your "bogus" product that I received months after I ordered it. Why? Because the ad was very deceiving making me believe that the tablets were good for a 2500 gallon fish pond which is what I have, not a fish "tank"! I need to return the 2 bottles for a refund ASAP. Please send me instructions. Thank you product is algae repellent agent costing 38.33 including shipping cost. Small white bottles with few directions on how to use it. I believe the company was summerrainey. User's recommendation: be careful, the advertisements are very misleading! :(.