Hydroponic stack

I mounted the tower into the lid of a 9 litre 'very useful storage box'. In the bottom of the box is an aquarium pump. That pump sends water to the top of the tower via a 13mm ID (18mm OD) section of tubing. The water then gets spread to the outside walls (internally) and it trickles down through each of the pods back into the tower and eventually back down to the box. The oversized thread on the base section is quite tight and may need a bit of cleaning up. But once it fits it's very satisfying to play with.