New in 2019-18'x9'x 52" Intex Ultra Frame w/through wall skimmer on 1200gph sand filter.
Old-15'x48" Intex Metal Frame-Was using (2) Intex cartridge filters because (1) of those suckers is inadequate. Pics at Two Intex Cartridge Filters-24 hour pumping
. Converted to sand filter, would never go back...
Don't waste time and energy looking for a better value on test kits, the TF-100 is the best deal around. Just go here: TFTestkits. I use Pool Math (and Pool Math App, what a joy!).