Just a couple of drawbacks to watch for. First, is any place the
nutrient solution is exposed to light will begin to grow algae. Second, the system is now more susceptible to airborne pathogens and fungi. Every place that overflows, and/or gets wet is a spot where airborne dust (and everything in the air) will stick. Then with the next cycle it will wash down into the nutrient reservoir, grow, and then be able to infect the roots. Including soil born diseases from airborne dust/dirt. But I hope it works well for you. Where did you find the 6 inch PVC?