At first I thought 'thats crazy, going to jail for collecting rain water'
As I scrolled through the details though, seems kind of reasonable. 13 million gallons in three man made dams that have not inspections is a serious amount of water to go wrong should the dam fail!
Could you run a feed and return pipe/hose and join both together so the breeder water also runs through your grow bed water?
I watched a really cool video on a bell siphon for those grow systems.
Caveat, not rain water related but is aquaponics related!
Not sure how much of this will be relevant to your search Deb, but here is a wiki link to the shows index. People have uploaded episodes to youtube, but the show does not seem to have their own channel, so some stuff is a bit harder to find...
I don't have a heap to offer, I was just shocked to read in the other thread that is was illegal to catch your own rainwater as 'it was someone elses downstream'
Never in a million years would I have expected to hear that.
He in Australia, water catchment is supported, we are water short...