Ring culture in the GH

This year, for whatever reason, the tomatoes in GH2 have been very poor and there have been lots of ants in the soil. I've decided to empty the soil out of the bed on the right (the sunny side) and line it with the wool insulation that I'm collecting. This will hold the water. I'll put some coir & compost on top of the insulation then move the supermarket crates (with their seedling salads) into the GH over winter. In spring I'll start again with ring culture pots and hope for a better season next year. 

I've had a change of plan! I'm emptying the old compost into 30ltr pots  and I'm going to try growing something/anything in these pots before I use it as mulch in the garden. I don't have much depth of soil in the garden and growing root veg like carrots is almost impossible. So I'm going to try growing carrots, maybe spuds and other roots in these pots. I'll still have room for the supermarket crates to overwinter in one of the GHs. 
I may scrap the ring culture growing system in this GH next year and grow solely in large pots that will sit on the wool insulation which, slugs are not supposed to like crawling over it. 

In my over active mind, I foresee each big pot being a little polyculture garden, each with its own character. I think there's room for about 12 pots on the 10' long side.