Last year we determined that, for my setup (which includes the pump equipment being about 10 feet higher than the water and about 40-50 feet away), that my Intelliflo VS running at 2200 rpm would turn the pool over and be the right setting. That worked perfect.
Now, however, if I use that setting, it won't even fill my pump basket all the way as it only fills to somehere along the intake line (where the water flows in). If I crank it up to 3400, it will fill to the top and look like it used to, but, over time, it will gradually drop back down to that same level. Over night, it will completely drain 100%.
I've already fixed a non-airtight plug but I have no idea where to tackle this one. What makes the pump basket drain over night or lose volume even while running? This is only my second season with the pool, so I'm still pretty dumb around here.