Is Aquaponics really the most economically way to grow anything ?

[Damon]

selling liquid organic fertilizer and plant specific bacterial cultures for system start up.

[GaryD]

That's right!

There are already lots of people who sell compost teas and various other organic potions. I see no reason why fish tank water blended with worm tea, probiotics......and anything else that is necessary to make it a truly beneficial plant tonic.

Note that I'm carefully avoiding the use of the term "fertiliser" to describe this product. It's not fertiliser.... although it does contain plant nutrients. It's not just fish tank water either. We've added all of the things that fish tank water is deficient in......so now it's more like plant milk.

It's a complete food....but, because it contains beneficial aerobic organisms, it also has a limited shelf life.

Lesser products are on the market.......as we speak.

It logically follows that, if we have the space.....and access to our own high quality plant tonic.....we could grow plants pretty cost effectively, too.

The growing systems to which our plant tonic is fed are not connected directly to the fish tank.....because the plant tonic contains things which only benefits plants......including pH.

Gary