The best way to test is an accurate 8 ph meter that will check in the medium. Some folks try and cut the corners and not buy it but to the price. But if it's something that can save your entire grow and the investment in it it's a sure bet
I think you are correct about needing an Accurate 8. I don't have one and wish that I did, so it's on my "need to buy" list. I am not convinced that measuring ph from the run off with a regular ph meter is very reliable for soil or coco. Regular ph meters are great for managing nutes and if you're doing hydro, but for coco grows & other soilless mediums and soil, I don't have a heck of a lot of confidence how accurate measuring the run off really is.
Better to be safe than sorry. I've had one of those el-cheapo soil ph meters for years. A couple of days ago I decided to test it by plunging the meter into a bale of damp peat moss. The meter gave me a reading of ph 7.
Yeah. Right.... Cheap soil ph meters are worthless. If Accurate 8s are actually accurate, they're a bargain at twice the price.
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