When my pool pump comes on in the morning it works fine for about an hour. Pump sends water thru the chlorine generator to the spa which then spa outflows into pool as normal. Then for some reason it pumps just enough water into the spa for only a trickle of water to drop into the pool. If I use the in-house remote to turn the pump off then on again the pump will restart and send the correct volume of water to the spa for anywhere from 30 minutes to 3 hours or so. Then the water coming into the spa slows down again to a trickle. The pump is running at the same RPM whether lots of water is coming out of the spa and in to the pool or just a trickle. The filter basket on the pump is clean...I can see thru the plexi glass top that water is coming into the filter basket at a good volume...the pump is running at normal RPM but again hardly any water is flowing out of the spa and into the pool. The large main filter was recently cleaned, my pool cleaner moves around in the pool as usual l, but my chlorine production is down because very little of the water that comes out of my IC40 chlorine generator is getting into the spa and then into the pool. Any ideas?