This season I'm also planning on adding sensors to the nutrient tanks. Sensors will report the status of the following:

1. The tank water level
2. That water is actually flowing from then return pipe.
3. Pump still has A.C power ( Gound fault has not tripped )

Cleaning the NFT tubes

Getting the NFT tubes ready for the new growing season. I'm scrubbing the the insides of the tubes, by closing off one end. Adding 1/2 cup of bleach with 1 cup of water to the inside of tube. Then using a piece of 1/2 inch pvc tubing, with a sponge attached ( see picture ). I pull the 1/2 inch tubing back and forth with some downward pressure thru the NFT tube. Works quite well.

I purchase some sweet 100 tomatoes plants early today. I hopine to get the NFT tubes up and running by next weekend, so I can insert some of the sweet 100's in the NFT tubes.