Ok, so I've been in my home for a year. Now that summer is approaching, I did a CYA test & it was through the roof, (over 100) & my chlorine is getting eaten away with the bright sun.
So instead of countering every bad chemical reading by adding more chemicals, and since I have no idea how old the water is, or how/if it was kept up, I figure a complete drain & refill would give me a fresh re-start for the summer and I'll know exactly what's in my pool water.
Here's my problem: I heard that, as the pool is draining, there's a danger of the pool plaster actually lifting off the ground underneath & creating a gap, so that when I refill, the weight of the water will crack the plaster.
Anyone heard of this happening? How often should an IG pool be drained & refilled?