I have a 16x32x48" Doughboy recently installed but it is freezing in the Northwest. (not literally) So I purchased some used solar heating panels I found on Craigslist. I got 6 panels that are 4x10 and one that is 4x12. The problem I have is they are from 3 different manufacturers and have different sized manifolds. The original owner had them all hooked and running but he is not around so I need some advice. Does it just go straight from the filter to the panels then to the pool? Are there any valves needed? Does the different size panels and manifolds complicate anything? Most sites say I need 2 panels 4x20 to heat my pool, should I just install 4 of the 4x10s? Any help would be greatly appreciated.