Film on my tub HELP!

[newtubguy]

!I got in spa tonight and noticed a sandy film in tub, I can't figure out why, too much chemicals, tested chemicals and they seem to be fine, anyone got any ideas?

[Chas]

Yes: it's calcium. Your pH and TA got too high and it came out of the water.

Lower both the pH and TA - and work to keep them low for a few days - and it will go right back into the water.

Don't scrub it off, and don't change the water until you get it back into the water.

Get the pH down to around 6.8, not below.

[newtubguy]

thanks for the info, I will start to lower pH and watch it over the next few days