Recommended levels for pools having tile surface

[amin36]

Guys I’m dealing with pools having tile surface.the recommended levels are for plaster ,vinyl and fiberglass pools as mentioned here: Recommended Levels - Trouble Free Pool

So what about tile pools?

Thanks

 

[mknauss]

Treat them as plaster pools. The grout used between the tiles is most like cement based.

 

[BubbaBasco]

For the case of an all tile pool with epoxy grout, I assume treating it like vinyl is the right thing to do?

That’s my situation and will be starting up soon with fill water that has CH of 20ppm. I’m wondering if it will be okay to leave the CH low and run a very negative CSI.