I have a very small pool - as it's the "pool" side of a "Dual Temperature Swim/Spa" - a 8' by 18' foot oval with a wall that separates the "hot tub" end from the larger "Swim" end (about 8'x12' with jets that provide current to swim against - think "Endless Pool").
Let's just think about the larger portion: 2,900 gal.
I had drained and cleaned it - had no big problem to make me do that - just thought it was time (some years).
So it was empty and immaculate.
Filled it with fresh well water - and water here in our part of central California coast is very hard (high calcium). I had forgotten to attach a filter to the end of my garden hose to help reduce the Calcium.
Tested: PH 7.4.
At first the fresh water was sparkling, but after a day or so cloudy. Hmmmmm.
Tested the Calcium: 450 - same as previous yrs. Clorinated, shocked and added a chem that normally clears the water. All the cloudiness left but:
Then came the strange part: pretty thick white powdery deposits, mostly on bottom, thinner on walls. NEVER saw this in the past 10 yrs. SEEMS like Calcium. Hard to vacuum: it's kind of off white color and sticks - though repeated passes of the vac with a little brush gets most. Had to get a special extra fine filter to hold it in the vac.
Even after vacuuming, there's still some residue. And still a thin layer on the walls. So I'm wondering if a chem treatment could work.
When I remove the deposits from the vac filter, it's a whitish goo. When it dries it's sort of chalk-like - hard but you can break it apart with fingers. Sure "seems like" calcium to me - but have yet to have it analyzed.
Anybody with similar experience??