The filter flow rate is .75gpm. I installed it today, after the pump, before the accumulator.
It decreased pressure but not bad at all. I only tested the faucet. Our shower
is a low flow head
, so I'm hoping there won't be a noticeable difference there.
Regarding micron size, I understand that cysts a resilient to chlorine, and to remove the cysts you need a .5 micron filter.
I think it's pretty unlikely we will get cysts in or tanks
, but rather safe than sorry. If it were just about taste I'd just use a charcoal filter with the largest micron size possible.