I have an elevated spa with spillover along with my 21k gal pool. Over the last week I've noticed that the water level is fluctuating very widely. When I first noticed it, the level was just above the jets, which is probably 6-8 inches below where it should be. But then the timed filter ran for the pool and it raised back up. This happened a couple times over the week where it would get low and then fill back up after the filter ran in the evening.
This morning when I checked, it was about 3-4 inches too low, and right now (8hrs later) it's lost another 3 or 4 inches. Not sure what's going on. I'm not noticing a big swing in the pool level, and neither has been used in this time frame, and we haven't had any rain either. I did have a guy out last week to fix my sensor flow switch on my SWG and I'm wondering if he did something or changed a setting to one of the valves. I've only had this pool/spa for 4 mos, and it came with NO manuals, so trying to slowly figure everything out. But Ive only noticed this fluctuation in spa recently. Thx.