Well I finally got off my can and soaked some rockwool cubes and stuck some tomato seeds in them. I've been incredibly lazy. I just pulled a sheet of rockwool cubes out of my stash in the basement and put them in those little plastic starter trays and soaked them with water, no nutrient. Then I put three kinds of seeds in the six-cell rows, four rows each: 1) Abraham Lincolns, 2) Atkinsons, and 3) Donas. All the seeds were leftovers from last year so I hope I don't have a germination problem. Well that was a tough ten minutes work, now to relax.
The other adventure was what should the system design be? I bought a little hard plastic kiddie pool about four feet in diameter for $10 and I'm planning to make it into a baby float system with a central waterfall for oxygenation. This is sort of a follow on from last years largely failed wick systems. The waterfall should address at least one problem. Float systems don't like heavy plants however since the floats tend to sink then so I'm not sure what I'm going to do about that since I really only want to grow tomatoes. I think maybe just radiate the plants out to stakes (that might be just the ticket).