I'm replacing the liner in our 24ft round agp and the pool stores trying to sell me so much stuff I'm not sure what necessary!! It ran off sand filter and pump but they're recommending a frog system to add to it.. is it really helpful or is there something more budget friendly. I've never got a pool up and running before so I don't have the first clue on treatment or maintenance. If anyone has any suggestions it would be greatly appreciated!!