Review on JARDLI Glass Lily Pipe Inflow + Surface Skimmer for Planted Aquarium with 16/22mm (5/8'' i.d.) Tubing by Linda Venerable

If you have a higher capacity canister filter without performance adjustment, you may think that this lily tube will not work because air bubbles are sucked in from the top, but actually , that is because the Slots in the bottom are not big enough for the underwater part of the air intake. I recommend that you drill some holes in the bottom where there is plastic to allow more water to enter from below and thus reduce the amount of air being sucked in.