pool is a semi in-ground 15x24 oval 54"deep. it's 16" above ground, located in New York. I bought the ultra gizmo because of the blow out hole and i'm looking not to drain the pool if possible. A 1/3 of the ultra gizzmo will stick out of the skimmer, my skimmer is not that deep, can i still use it? will i still have to block off the skimmer with the tupperware where the flap is. this is my first year having the pool. all the research i did, involves draining the pool. still have time, I was in the pool yesterday, but it's time to figure out what to do and i don't want to go near a pool store,nothing but bad advice there.