FWIW, there are many monitoring devices which you can use to check the status of your system. Some are expensive, some not so much, but all are probably out of the range for home aquaponic systems.

If this thing really could do what they say for under $400, it would be ideal. At this point, I'm a little skeptical even if they do get it in production.

If you are really good with electronics, you can build your own PLC with remote monitoring and controls. I know some folks who taught themselves how to design and install PLCs, so it can't be too difficult... if you have time and money.

I'm guessing Arduino is possible for this as well.