I'll post updates on the greenhouse after I get the growbeds in. I need to get some breeder tilapia outside and get some babies before it gets cold. They are too large to breed inside.

I discovered something interesting about the bell siphon. It actually does need the 1/4" air hose to kick at low flows. As it turns out the 2nd bell siphon would only kick once the first kicked and it went based on the suction created by the draining of the 1st one. It would just trickle until the 1st one kicked. Now I need to re-plumb the drain line so that each bed goes into the larger drain line on its own. Otherwise one or the other will trigger early when the 1st one kicks.