Good Morning all -

Just found this forum and it has already helped! We've been battling algae since about mid season, going from a green pool to clear and back again. Reading related threads has been a huge help so, hopefully, bleach, bleach and more bleach will eventually solve the problem.

Since about the middle of the summer we've had the problem with the pump loosing suction. Not completely of course. It will run at around 22 psi and then drop to around 10 and then back up again.

I've filled out the form with our pool info but figure this will make things easier for everyone:

Ours is a 20 x 40 in ground pool ranging from approx. 3.5' to 10' deep. We're using a Century Centurion 1 hp. motor from AO Smith pumping through a Tagelus Sand Filter. We bought our home in March of last year after it had set from neglected for a few years. We drained the pool and pressure washed it and repainted it. We also emptied the filter, replaces a couple of broken pieces inside and refilled with new pool sand. This year the pumping system worked well until about mid summer. When it quite drawing is when we began our battle with algae.

Looks to me as though I'm drawing air from somewhere but I've been unable to locate the source. There is no water around the motor, strainer basket or sand filter.

Thanks in advance -

BTW - this is our first pool -

doc