As described in another post, I'm building a hybrid raft/wick hydroponics setup for my office. Rafts of thick styrofoam float in nutrient baths, each one occupying the whole bath (for maximum lift and to keep algae populations down). Embedded into each raft is pots full of vermiculite insulation which reach all the way down to the water and allow it to wick up (sort of like setting a pot in a tray of water). The reservoirs are not oxygenated; the roots are supposed to remain within the pots where there is air between the vermiculite particles (I wanted as passive of a system as possible).
What I'm wondering is what size pots to use for different plants. I'm familiar with soil-based growth. I understand that hydroponics plants develop smaller root systems since water is more available, so smaller pots can be used. What I don't know is how much smaller.
What size pots would you use for each of the following:
* Dwarf tomato (~2 1/2')
* Small pepper plants
I'll also be growing some other stuff, but I should be able to figure things out from there.