Input on water testing and maintenance controllers

[lyfespan]

This new Hanna is recockulous
http://shop.hannainst.com/edge-ec.html

 

[DankHobbyist]

Don't use distilled water for tds meter. I think it will mess it up.

 

[zem]

Don't use distilled water for tds meter. I think it will mess it up.

not all tds meters are the same in that matter, some recommend to clean with de-ionized water which is even more distilled than distilled water, and others do not recommend that, I was talking about making my own calibration liquid from distilled water+NaCl(AKA salt)

 

[DankHobbyist]

Cool much cheaper nice idea.