45/55mm Hydroponic Pot

No, not that kind of hydroponic pot. This is just a little plastic tub with a mesh bottom that you fill with vermiculite, perlite, clay balls etc. and plant hydroponic plants in. The pots then go into 45mm or 55mm holes drilled in a piece of 100x50mm rectangular downpipe to form a [ http://en.wikipedia.org/wiki/Nutrient_film_technique ] Nutrient Film Technique (NFT) hydroponic system. I grow a lot of tomatoes, beans, lettuce, brassica, celery, basil etc. in my NFT runs but the pots keep on break