Ok so I had a crappy pool contractor but I caught most things and had them corrected but I only have 2 returns in a 16x32 vinyl pool. Direct recommendations
Oh red is return and green is skimmer, 2in pipe all around except at where the pipe splits for the returns then drops to 1.5, 425 cartridge filter pushing 70 gpm of flow
Keep in mind the most influential aspect of skimming can be wind. You can get on google and look up the most common prevailing wind direction for your location. Then, put the skimmers in the face of the wind and try to direct your returns flow with the wind.
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