Its air in the line.i unscrew the line that goes into the chiller and pull it out for a split second so the air can push through.when a little bit of water starts to come through pop it back on the chiller and screw it back in.Had trouble on a flush tonight priming the pump. Not sure what I was doing wrong. Got it going and was pissed off cause I had water everywhere so
I lost my shit over some water on the floor. Did a flush and couldn't get my pump re-primed very easy. Drained nice and easy, refilled just like you do, but the damn pump wouldn't go. Any tips there? My pump is external just like yours. I'm gonna go back down there in a min and clean shit up, but I had to walk away. lol. Running this setup in a 4x4 tent with 6 sites. 1/2hp chiller. 4gallon buckets, 42gallon top off, 55 gallon res to mix r/o and nutes. I need to adjust spacing a bit after this grow. Sites are a little too close to the walls of the tent.