Hydroponics in PVC pipe

Wanted to grow in PVC pipes. Got a 3inch diameter pipe. Cut holes, added end caps. For the water intake added a smaller hole (you can see that on the left). Added a C ring cut from the same PVC pipe to cover the hole so that it can slide for easy access and also save from algae growth in the nutrient. This pipe has 7 grow ports. Also holds a little more than 1.5 L of nutrient. Single set of nutrient runs for an average of 7 days.