I wouldn’t get pH strips if you care about being accurate with this. Just think, a few points difference in pH could mean you lose the whole crop, it struggles the whole way through or your yield is greatly diminished. Get one of these and get a bottle of pH 7 buffer solution so you can regularly calibrate it. Anything other than a good pH meter and you’re basically safer off just guessing.
Guaranteed it’s a pH issue then. Those meters are incredibly inaccurate. Honestly if you’re serious about saving your crop, you’re going to have to invest about €60-70 euro here to get a good pH meter and a TDS meter, although no need to get an expensive one of those because it’s a very rudimentary circuit in it.
This is the one I use and I can can attest to it’s accuracy.
if i use 7 gallon smart pots how many plants can i grow in my tent? about 2 or 3 no? A PH meter i will add to the list.
I was going to go for this one but haven't bought it yet. I'm a firm believer in 'you buy cheap you buy twice' so I wouldn't risk buying a really cheap one. I know its more expensive but it gets tons of 5 star reviews.
I got this and I have been very pleased with its accuracy.