The first 28 days after a cementitious pool finish is filled are not ordinary pool maintenance. The finish is still curing and hydrating while it is already in contact with water. Filling, brushing, filtration and chemistry management during this period can materially affect appearance and long-term durability.
Startup Is Part of the Finish Job
The National Plasterers Council publishes a dedicated startup procedure, and Pebble Technology publishes product-specific startup instructions. Both emphasize frequent testing, brushing and controlled chemical adjustment. Proprietary finish instructions should take priority where they differ from generic guidance.
The Fill Itself Matters
- Follow the finish manufacturer’s instructions about fill water.
- Avoid interrupting the initial fill if the manufacturer warns that stopping can create a waterline mark.
- Do not casually use softened water where the finish instructions prohibit it.
- Do not enter the pool before the fill/startup conditions permit it.
Expect Plaster Dust—but Manage It
Cement hydration can produce white plaster dust. NPC and PebbleTec both emphasize brushing/filtration during startup. PebbleTec warns that allowing white material to remain on the surface can contribute to stains, blotchy discoloration and roughness.
Salt Systems Should Not Automatically Start on Day One
PebbleTec’s current care instructions specify waiting at least 28 days before adding salt for a saltwater chlorine-generator system. This is a good example of why homeowners should obtain the exact startup sheet for the installed finish instead of relying on generic pool-service habits.
Keep a Startup Record
- Date/time filling began and finished.
- Fill-water source and initial chemistry.
- Daily pH, alkalinity and calcium-hardness readings during the specified startup window.
- Brushing and filtration schedule.
- Chemicals added and by whom.
- Photos of appearance during the first month.
That record is useful maintenance information and can be crucial if the applicator and service company later disagree about who caused discoloration or deterioration.