I saw that you can buy either 1 waterfarm or a full 8 pot system, Is there any way just to have 4 connected with a reservoir instead of 8? Thanks!
I think you can buy 4 Waterfarm modules, and a controller unit, to use with a reservoir. You can also build a DIY system and link it together with a control bucket and a reservoir. Try reading Lets Build a Bubble Bucket *Step by Step*. These DIY buckets are similar to the Waterfarm, and with a little ingenuity, you can link the buckets, add a control bucket and a res....and save some money.
http://forum.grasscity.com/indoor-grow-journals/450434-gh-waterfarm-organic-hydro-grow.html DIY waterfarm instructions in this thread