I wasn't shocked while coming up to B period earlier to find that most of the plants in our vertical tray withered. I wasn't able to come on Saturday to check on the plants but Sneha came in my place and saw that everything was in check. Somewhere between the time she visited on Saturday until B period this morning, the tube led through the vertical column disconnected from its pump. During today's period I reconnected the tube to its pump using the red electrical tape as shown, as a temporary solution. Tommy and Sameer added a bit more of the fertilizing mixture as well. Before I left, I turned on both pumps. On the plus side, or horizontal tray was perfectly intact and Oliver's EC and pH meters worked.