Ya, I have mine running two prop tanks right now, while I work on the new setup. I have both 1 1/2" ball valves throttled back more than half way and still there is a ton of water flowing. Luckily, I will be using the geo built sump from my existing prop system when I switch over. Its a three section sump with about a 1 1/2' x 2' x 1 1/2' first section. I'm hoping that will handle most of the bubble issue. There is a second section, about the same size, currently used as a small fuge, that will be modified a little, but should still act as a second bubble break.