As you can tell from some of my previous posts I have been trying to dial in my CA reactor for about a week and a half now. I was running the effluent to a cup out side of my tank just to get the alk/ph correct. The tube from the reactor to the cup was only about 8"(a drip rate of 40 per min) and now that the effluent ph/alk is what I want I ran the tube (about 18") around the back of the tank to my sump and my drip rate is now zero. Does the longer run effect the drip rate? Should I increase the rate ? I don't see any kinks? I just cant figure this out? Can anyone please help with this.