i have an issue with the water flow in my system. from this picture you can see that there are 6 (1200 gallon) tanks. the water exits the bottom of the tanks and flows to the sump tank all the way end (the smaller tank on the right at the back of the photo). i have been running the system for over a year now and i am running into a problem. as i get further from the sump tank the level of the wat…