Just an observation, a friend has been taking care of his pool for about a year and cleaned the filter a couple months ago. About 15k gallon salt water gunite pool.
He asked me to look as to why the water wasn't flowing as good and he has the VS pump and it's set on speed 3.
Turns out the filter is very dirty. We do get a lot of blowing dust in the desert.
My question is, why does the filter look so small? 60 sq ft? I think the cartridges are 20" tall and I just lifted all 4 cartridges out at once to clean them. It doesn't seem like 60 sq ft.
And no backwash valve.
At this rate he'll have to clean the filters and recharge every month.
Does that sound right?