I hope I'm posting this in the right section.
I'm having an issue where seemingly out of no where, my hot tub water level will drop lower than the water level of the pool.
For instance, just now, water levels were even between the pool and hot tub. I backwashed the pool and the only valve I messed with was the backwash plunger. After that, I returned the pump to normal and noticed a drop in the hot tub water level. Keep in mind, this is not the only instance where this will happen. It also happens after other random times when I'm adjusting a valve or maybe even just turning the pumps off an on.