Thought I’d show off a project I’ve been working on. The day job is building systems automation so I’ve accumulated some out of date controllers(destined for the garbage) in the past month to integrate the tank. So far I’ve worked out a diy pH probe, temperature, and auto top off. Temp, ph, and auto top off data are trended for a month. With the little bit of programming ive done it sends text alerts when temp or ph are out of range and will cut off my top off if the ph rises too high/fast or the pump runs too long. Yet to come is heater control and pump status. Only cost so far is the ph probe. Let me know what you guys think!