Going thru all of salt

[waterbear]

OK, you are losing salt and CYA (since I assume you did have the recommended amount in the water). If you do not have an automaitc overflow drain I would start looking for leaks.

[Pool Clown]

What makes you think you are loosing salt? 0 CYA does not mean 0 salt. If you are going by what your unit is saying the salt is, stop, and take a sample to your pool store to get it tested with a meter, not test strips. There is a chance that the unit is giving you the wrong salt reading, thereby telling you you need more salt when actually, you're putting in (way) too much.

[dmanb2b]

Salt test strips (Acucheck) tend to be accurate within +/- 300ppm...it could be the SWG unit, but if CYA is declining, then salt is too. Like salt, CYA does not evaporate. It can vanish (another topic...can convert to ammonia) in the offseason, but if the pool is properly maintained during the swim season CYA comes down with dillution, as does salt.

[Poolsean]

Moreyes, a scaled cell can cause the salt reading to read lower than it actually is. Remove and inspect the cell blades to ensure there is no calcium hardness build up between the blades in the cell.

How are you determining the salinity level?