Amazon has the Tetra PlecoWafers Algae Wafers (5.29 oz. Bag) for $3.99 - 5% off with Subscribe & Save (can cancel anytime) - $0.80 off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $2.99 with free shipping on $35+ or with Prime (extra 15% off for 5+ subscribe and save orders).. Nutritionally balanced vegetarian fish food for bottom feeders.