All I do is to drain the pump. The header system is one inch black poly and the drip lines are picked up and stored. We got down to 7°F this winter so I've yet to find out if I had freeze damage. I doubt that I did.
My lights are 4ft. LED and 5000k light color. Two on each shelf. Good only for vegetative growth. I keep the light about 2+ inches above the top of the seedlings. If too close the plants will burn. If too far, they get leggy. Plants get 18 hours of light per day. The reflective material is Mylar held if place with clothes pins. Soon the plants and trays start spending time out inf the sun on the back porch and exposed to cooler night time temperatures to harden them off. Tomatoes run about 30 days behind the Cole crops due to being frost sensitive. The tomatoes will be potted up to 4 inch pots in the next week or two. Lots of people use this seedling growing system. Check our facebook 'Row by row' and Hoss Tools for some good information.
The potting soil is Pro Mix BX and can be found at some Walmarts.
Unless caged ducks or chickens would wreck havoc in the vegetable garden.
