gizmo for automated nutes and acid?

Im sure they exist, but probably expensive as hell...

in addition to ph and tds wall mount monitoring, is there a controller that when either ph rises to high, or tds falls too low... that it would automatically add a bit of nutrients to the water or acid (so it would have to have 2 or more chambers to store nutes and acid to be added to the res)

thanks

I'd be shocked if there was a commercial off the shelf solution for that. Building your own is certainly possible, but if you had the skill to do something like have your own PCBs fabricated or use a programmable board, you probably wouldn't be asking that question.