Amazon has the Api Pimafix Antifungal Freshwater & Saltwater Fish Remedy (8-Oz) for $3.63 - 35% off coupon (check “Save an extra” box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $2.88 with free shipping on $35+ or with Prime (extra 10% off for 5+ subscribe and save orders).