Can anyone tell me what is causing this oozing from the grout between the tiles? I have to periodically scrape it away with a razor blade to keep it from taking over. Thanks. 
Calcium Stains?
- Thread starter Frankhugus
- Start date
Some is from calcium carbonate from water that is spilling over the overflow and evaporating.
Some is likely to be efflorescence from water migrating through the wall.
Some is likely to be efflorescence from water migrating through the wall.
- May 23, 2015
- 24,705
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
You can try dilute acid in a spray bottle and a stiff Tampico brush. However, evaporite deposits will always occur so this is simply a maintenance job (annual acid cleaning). Better control over water chemistry (negative CSI) will help.
If the crust gets really adherent to the point where you can not scrap it off with your fingernail, then you may need to explore soda blasting with kierserite media for physical removal.
If the crust gets really adherent to the point where you can not scrap it off with your fingernail, then you may need to explore soda blasting with kierserite media for physical removal.
