VFS Siphon in Action - Aquaponics Media Grow Bed

Looks good.  I was concerned that the roots of the plants or the bioslime would impede it but it looks like that's not a problem.  I guess keeping an eye on it and working it manually daily will keep the slime and algae growth from plugging it up.  Good job.  Are these for sale anywhere?  

it´s an excellent system, are you also going to share how to make one? or that´s only for sell?
thanks

It appears loose enough to freely travel yet does not leak. How is the siphon tube sealed to freely slide through the bulkhead?

I like that it doesn't sound like a toilet when it breaks. Seriously, it's why I don't want to do ebb & flow in my apartment.

Seems like too many moving parts. I'd imagine this to be more maintenance than a bell, no?

were i buy it?