Dirty tile

[loridud]

Just curious if anyone knows a good product to get rid of these stubborn deposits (attached pic) on my pool time....and mainly in the spa. I tried a little cleaner and some elbow grease yesterday and no luck! It seems like it is hard water deopsits or something.

Thanks, as always!

 

[waste]

You can try a dilute mixture of muriatic acid (31.45%) and water ***always add acid to water not vice versa!!!!***. If you end up having to use a lot, keep an eye on your pH