TLC Membranes Membranes for use with non chlorinated water 15gpd Quantity Ordered Price Each 1 to 5 $ 33.00 6 to 10 $ 31.00 11 to 15 $ 28.00 16 and Above $ 28.00 Add TLC gpd: 25gpd + $ 28.00 35gpd + $ 31.00 50gpd + $ 39.00 100gpd + $ 52.00 (You can always remove this item later)