I dose kalk slurry (calcium hydroxide or pickling lime) to my fish tank to maintain alkalinity and calcium. I cobbled together a simple sketch that runs a mixing pump every hour and a minute or so later a peristaltic pump doses the tank.
It works great except for one problem. After the reactor is loaded with fresh kalk, the dosage starts slowly declining-noticeably so after a couple weeks.
I was wondering how involved it would be to use a turbidity sensor to dose the tank at a given level of turbidity rather than a certain time after the mixing pump has run. Is it feasible to combine this with Arduino?