Hi I have around 40 starwberry plants on beds. They take up a lot of room and I rarely get to eat the starwberries before the slugs get to them. I have decided to build a strawberry tower to solve my 2 issues with space and slugs. I have attached a picture of my tower below: The tower is not finished yet. I am going to put these on a base of wooden stilts which will be electrified with 9v wire which will zap any slugs that try to climb up. I have seen towers made my other people in pintrest where people just drill a hole into the timber and squeeze the plants in. They regret because they cannot water the plants very well. Watering from the top does not trickle down to the bottom. So I decided to spend the time and make balconies for it, hoping to water them easier. I am having a bit of cold feet transporting the plants over just yet. I am thinking of putting an internal watering system as well. I was going to make a watering system shown below, built using PVC pipes. There seems to be a lot of talk online on how PVC is a toxic and dangerous chemical to use. I was hoping for some clarification on this. My plan is provided below, a lot of people are using a straight pipe with holes in them. I didn't want to use that design, because the soil can easily flow into the pipe through the holes over time and block it up. So I have come up with this design so that the water distributes evenly and the soil can't flow into the pipe.