Hey! Having issues with the valves clogging on some pots. We run canna. The reservoir is only about 12 inches off the ground. Is there a certain height it should be off of the ground? Currently there are 16 pots to one 50 gallon resivoir. Usually never more than 20 gallons at a time per fill up. I was wondering if maybe it was the height of the reservoir off the ground or not having enough water in it for how many pots are on one system. Any help would definitely be appreciated!’