Stupid question I know, but after two years in the hobby I am finally setting up an ATO. I have an aqualifter to pull RODI into the tank from a resevoir. What/how do I ensure that my hose stays at the bottom of the resevoir? My hose wants to curl up and I am afraid it will just go to the top and suck air. Zip tie it to a rock?? Man I feel stupid. :frusty: