Position liner in tray, taking care to secure retaining band around all edges of tray. You must carefully puncture small holes to accommodate your ebb & flow, or other plumbing fittings. DO NOT MAKE THEM TOO BIG!
No large than a pencil is optimal. Keep in mind that these liners must remain water tight! Be careful not to compromise the liners integrity; Too large a hole, the liner becomes defective. Utilized properly, you will receive the full benefit of GARDEN ARMOR. Improperly, you could end up with an all too familiar mess on your hands!