not to off track this thread but with the ebb and grow buckets, you should consider converting it to a drip system. now i know why divestoned converted his. when your system irrigates the water has to pass through hoses all the way up to your buckets. well after it irrigates the old water stays in the hose which makes it bad when you have a bucket far from the controller. so every time it floods the furthest bucket doesnt get the nutes it should. well thats what i noticed in my ebb/gro grow.