Hi I have a 15x48 inch Intex Pool. I have recently purchased the 14 inch 1600 gallon sand filter set up. And I got attachments for the bigger and smaller adapter holes. My question is, I would like to have the bigger size adapters on my pool, should I just cut the smaller black rubber adapters out and just put in the bigger size adapters? I also have a wall mounted skimmer, I need to know how to properly install it and where to put it on the pool? And if I can, can I put it on over the return hole on the pool?