Oh if I had the money I would get one of those electronic ones like my friend had. I think he spent about 50 pounds on it and used it for his lab work so I would borrow it.
I have a soiless mix and the fertz I am using are home brewed compost teas from guano, kelp, and hopefully worm castings soon. I do not know if those fertz are ph balanced or not and since I am brewing it I want to test it with the soiless before I move on.
The first time I spent a lot of money on liquid fertz from major distributors and all this stuff. This time I just hope I can be a Bob Villa grower LOL.
I just wanted to know what people find to be the most effective way to test and what their trusted device is. I guess everybody has their own.