I have an Intex 18,x 48" round. Last year I added a Hayward skimmer box and a solar heater with a second dedicated pump. I ran that return over the side as I wasn't ready to cut another hole into the liner. Worked, okay but when all the kids get in, the hose hanging over the edge always get beat up and I worry they will knock it out and then all the return water will just pump out. So this year I got a second send of returns, factory Intex 1.5" and want to cut a hold for a second return. I have lowered the water, but am scared to cut a hole in case it's not strong enough and it blows out the side of the pool ruining it. I was looking for a patch to add a second layer of vinyl like the stock return has, but everything I find is only 4"wide and I would need about a 6" wide to be the same as the stock ones.
Please help. It's almost time to fill it back up and start cycling it.