CALL FOR QUOTE The 3-inch tablets can be used in chlorine feeders and floaters. Aqua Pure Enterprises, Inc. does NOT recommend adding this product to your skimmer, however if you decide to use this product in your skimmer (NOT recommend by Aqua Pure Enterprises, Inc.), based on product labeling, do NOT add other products to the skimmer or chemical feeder while using Trichlor Tablets.