Swimming pool anti-slip tiles - any advice on grouting

[frances.inglis]

I have posted on here before when my husband was designing and preparing to lay a pattern on a circular area of flooring. (We are doing second fix on a self-build house.)
He is now working on tiling an indoor pool. The steps into the pool and the shallow end are pool specific tiles and anti-slip.
Does anyone here specialise in tiling pools and have any advice on grouting technique, since the surface of these tiles is so rough?

Hopefilly
Frances

 

[Time's Ran Out]

Any reference to the tile used.

 

[frances.inglis]

John,
The tile used is Johnsons AP841A REF122 – Pools Antislip Azure 250x125mm.
All preparation and adhesive have been ARDEX and the grout is Ardex Flex FS.
Frances

 

[Time's Ran Out]

Those tiles are porcelain, less than .5% water absorption and chemical resistant class A - so practically indestructible!
I'd grout a small area at first to see how easy the Ardex fs comes off, using a blue/white scothbrite on final clean and polish.

 

[frances.inglis]

Thank you