When I first saw this website, I thought it was great on so many levels. My group of friends store food ,and growing some indoors year-round fits in with that concept of thinking about the future ,when the country may suffer food shortages. As a 6th grade teacher, I am going to have the students build a class windowfarm of their own.It will be fun to see how they troubleshoot! My setup is not an airlift system. I am experimenting with a reservoir on top that drips down 3 containers to a receptacle at the bottom. I’m using a perlite/vermiculite mix without net cups that I prime with water first. The drip is very slow and I hope it will stay wet enough until I get home from school to recycle the reservoir. I won’t have plants in the farm until I get the drip speed down. I want to thank the person who suggested using a 5 gal. reservoir on a single outlet pump. I have a double outlet pump for my next windowfarm which is an airlift. I couldn’t find needles, so I used a ” T’ connector with a single outlet and regular airline for the airlift tube. The middle of the “T” is connected to the check valve and air supply, the other ends are connected to the airlift tube. The “T” comes in where the needles would have been. I’ve been able to get 5 feet of lift with this “make-do-with-what-ya-got” setup. Thanks to everyone for all the great ideas and comments and to Britta and company for the movement.