I havnt grown in coir in over a decade and forgot how fast the plants take off.

Three plants in a 3 gallon tray , they were meant to fit in my little micro grow and chug along nice n slow , thankfully a bigger space was available nearbye , the tops sit at around 4 foot. Have been having issues getting the right watering schedule as the tray is so small, i also without thought mixed in a very small amount of home made super soil to fill the tray and didnt allow for it when feeding which sent my runoff EC off the scale , have dialed things back a bit and things are looking ok for now ... still not convinced I'm half a step away from disaster ... time will tell .