Well,didn't open pool last year.We are planning on getting started this year.I have a Pro coming next month to Install new liner and he is also going to install drain and install 2 new inlet's.Trying to help on keeping my clean up easier for sure.Also,converting to Salt..Couple ? here.First,since my sand filter set last year without use.I think I changed sand out about 3 years ago.Do I need to change out sand?Second,I've been running a Matrix Powerflow for 12 years now.It has been good.But,I'm thinking of ordering a new pump.I was looking at another 1 horse Matrix.Should I get the 2 speed version ? Also looking at the PowerFlow Version which is cheaper than the Matrix in price.My Pool guy was telling me that I should change to the SuperPump.But,honestly I can't see spending $350 for a pump/plus don't look like it is wired.So I will have to do that to.Any suggestion out there?Thanks