I'm ordering the 2 inch one . Glad I checked ! What kind of sand ?
High-Rate Sand: No. 20 Silica Sand (0.45 mm–0.55 mm)
www.troublefreepool.com
Pentair uses US Silica Mystic White II sand for all of their testing. It may not be readily available at Ace/Home Depot though. In general, we recommend getting your pool sand from a pool supply store and not a hardware store as they are far more likely to stand behind what they sell than a big box store.
Be aware that members have had issues with Quiikrete Pool Sand. Members find that Quikrete Pool Sand is too fine and perceptibly heterogenous (i.e., not filtered to #20 specifically). It does not filter well and tends to blow back into the pool. A search in the Forum can provide more information about the issues.
Swimming Pool Sand filters generally use #20 silica sand which is approximately .40 to .55 mm.
If the slits in the laterals are a little bit large and the sand is a little bit small, then you can get some sand passing through the laterals.
MYSTIC WHITE II filter sand has three effective sizes, 0.49 mm, 0.65 mm or 0.80 mm.
MYSTIC WHITE® II 0.49
MYSTIC WHITE® II 0.65
MYSTIC WHITE® II 0.80
Also I'm noticing I have more jets from pump into pool that I do not see any water movement thru them. Please tell me that's not hard to fix . There are several that don't appear to work .
Depends on the way your pool returns are piped.
First thing is to look into each jet and see if it is clogged.