Cheers bro, I ended up using 2 aquarium check valves on the pipe going into the cupboard, it just needed some air, as you said! Been testing it the last few days and it's worked...WOO HOO
Hell yeah man, very excited about the new gear, was going to pop my In House gear and gorilla grip but they can wait one more round
going organic this time and holy crap, these girls are looking great. Been brewing some compost tea so will be feeding them today!! If my organic soil mix works, I'll be going organic from here on I think