So I'm trying to change out my filter and pump. I currently have a cartridge style but I'm not a big fan of it. I would like to switch to a DE system and I'm thinking of the Hayward EC50. I have a single speed motor now but was thinking of switching to a 2sp. So I went to the local pool store which I usually try to stay away from and got nowhere they only want to sell you what they have in stock everything else they don't recommend lol. Basically my ? Is is it worth switching to a 2sp motor and do I have to change any wiring ? Also what HP should I run ? Now the other ? Is I'm adding a slide to the pool this year it's about 4' tall good for the kids and has a hook up for water off the pump. Will the low speed setting on the 2sp motor be able to run this slide ? FYI I have some long runs of hose but I use the solid hose not the cheap stuff.