Turns out my drain pump in the control bucket would sometimes suck air and become air locked before the float would shut it down. then the Next fill cycle would fill, then drain cycle would start and the pump would run endlessly and the buckets would never drain.
The fitting that goes into the pump in your controller bucket can be taken out (when the bucket is full)and let it run and then insert the fitting (underwater) is how I solved my problem with this. You will find the magnetic shaft has a catch key on the end of it that sometimes misses the propeller part that forces the water out.
If your girls are rooted fear not they will take it in stride and go on.
IMO you will NEVER see growth like you will when these buckets of love are dialed.
Mr.Wags