These spots calcium deficiency?

Get the best pH probe that fits into your budget, this is one of your most important tools, most frequently used in my case. Keep your strips to periodically double check, if you’re in doubt.
Lots of decent brands out there Hanna, Apera, BlueLab, Ohaus, Oakton, Fisher etc… Don’t waste money on the cheapos, they’ll cost you “lost time” in the end.

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I bought a Ruolan… it just came in today I measured my pH it’s 5.97

If its one of these, Don’t accidentally let it dunk, its not waterproof. Keep those strips handy like I said above.

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Mine is always in the low 5s. Like 5.2 or 5.3. Even my rainwater and jacks hits around that area. The rainwater starts around 6.7…

Wats the cup for ?

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LOL I used the cup to hold it up when it was just a seedling it wanted to flop over to one side.