Iâ€™m having problems keeping my drip rate steady on a DIY kalk drip unit! Iâ€™m using one of those wheel style pinch valves with Â¼â€ vinyl tubing. I do let the kalk set for about four hours before I first use it & I have a mini ball valve to shut it off during the day. I will set it at one drip per sec at night & by morning itâ€™s less than one drip every 3~4 sec? The bottom of the kalk storage to the top of the sump is about a 12â€ ~ 16â€ drop! Does it make any difference if the line goes straight to the sump or does it help to let it loop down then come back up? Or are there any other tricks to keeping the drip rate steady?