It works quite well in my experience. I still recommend cross checking with a liquid test like Red Sea as nothing is perfect. But the Seneye will literally show you how your ammonia rises and then is converted over hours. It’s also a PAR meter which is cool. Downside is for the PH and ammonia reading you need the slides (really only needed while cycling tho. It also requires to be plugged into a USB 3 to work. View it more as a temp and PAR meter more than anything else. So if you want a temp monitor and PAR meter you’ll like it.hows the ammonia monitoring on it?