Derby's Fly By Night Photos

These things read almost instantly. I keep them in a jug of water and after I mix toss them into the jug of nutes and bam < 5 seconds I'm feeding or adjusting. Much better than my pen. Plus my pen is hard to mount on the top of container. This just toss them in and don't care if the whole thing sinks. Head is kind of mounted to the shelves and the sensors are 6' or so.
So one could work for a few of them

Interesting
 
You could take it from bucket to bucket and know exactly what your ph and ec is in each in no time.

Already in my Zona cart

Lol
 
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