I purchased a new house with a pool during the winter, I opened the pool to find these white or light blue stains on the dark plaster surface.
I can't tell if the stains are white or light blue, they could be light blue because that is their natural color or because it is a white stain on top of a dark blue plaster surface.
The stains are very smooth to the touch (which might indicate they were deposited on the pool) and while they cover the entire pool, they are more "dense" in the spa.
Do I need to resurface the pool or are these stains that can be removed or sequestered / and then filtered out of the pool.
These are the results from an aquacheck test strip. New "forum-approved" kit coming in the mail soon.
I previously owned a pool in a prior home.
Pool Size, 15,000 gallons (guess), IG, Plaster, DE Filter (trying cellulose media for the first time), Pool Installed 2004?, Spa, Polaris, Propane Heater