Amazon has the Fluval Bug Bites Granules for Small to Medium Sized Fish Bottom Feeders (1.6 oz) for $3.16 - 5% off with Subscribe & Save (can cancel anytime) - $0.63 off coupon (check “Save an extra” box, eligible on first S&S order for this product)= $2.37 with free shipping on $35+ or with Prime (extra 15% off for 5+ subscribe and save orders).