Aquaponics https://en.wikipedia.org/wiki/Aquaponics is a highly productive, technologically advanced farming method. There is a huge need for software and hardware to monitor and controll the setups and the math can get pretty daunting. So why haven't I seen any aquaponics monitoring and management as a service startups on here?
And by huge need, do you mean people ready to drop $$? If so, in what country? As someone who has been following aquaponics in America, it feels like it isn't nearly as popular here than parts of Asia and Australia.
By a huge need, I mean that in order for the tech to work, a lot of software has to be written.
I think that the market is made up of anyone currently eating organic, who lives in a southern climate, and would like to have a machine attached to the front wall of their house which produced fresh food for them with little worry or cost, and a lot of good feeling. My impression is that market is huge. It's the organic blogger mom market which seems to be a really big spender.
Aquaponics requires very little water ;) Each system contains a lot of water, but the water is constantly recirculated and loss is only through evaporation and plant absorbtion.
What it actually needs is light, and if outside, year around above freezing temps, so LA is WAY better than Seattle or Portland for it.