Low PH Causes

[KurtV]

On a new build I really think you should talk to the builder about what he's trying to do with your finish (in case he's doing a high-acid startup) and get him to put the finish care instructions, including water chemistry requirements, in writing. You don't want to give him (and SGM) a cudgel with which to nullify your warranty. In the event of a problem they'll probably both point at each other anyway, but you don't want them to be able to point at you as the source of the problem.

Once you get the care and feeding instructions in writing (if the builder won't give you anything, SGM's Diamond Brite requirements can be found here), maintain a water testing log so that you have some record that you've done your part.

[Simmons99]

Okay - thanks for the info. DH was telling me that you are supposed to keep it below 6.8 so more of the "plaster comes off" so that more of the color shows through. Documentation says closer to 7.4 - so I will try to keep between 7.0-7.4.

I don't think the builder is doing an "acid" start-up they did an acid wash on the finish already and his answer was that you are supposed to add acid everyday - so I don't think he is shooting for a specific number - just doing what someone told him.

We tried talking to the finish guys - but no one spoke English.