from what i've read w/ the 30" limit on these aqualifters, it's ability to PULL liquid is 30" limit, but it can also push the liquid quite well afterward. i ordered one and will be putting it through tests to see how to set it up w/ my new tank setup. i figured it'd be the cheapest, easiest way to autodose and auto top off. i'll have updates in my thread when it's all said and done
