Looks like bad pH is making your plant unable to take up the nutrients it needs. Grab a pH tester from Amazon and keep it between 6.5-7.0. My household tap water tests at a 9.1, as high as 9.6 sometimes, and that's way too alkaline for the plant.
I wanted to try testing the ph of my products and I was wondering if there was something better than the strips. I fount this in amazon. It's for testing the ph of pools but it looks like it could work for cosmetics? I have done a quick search but I only found people using the stribs in the subreddit (maybe I didn't search correctly), anyone used something similar to this?
You could buy a small pack for like $3.00 that would possibly last you the rest of your life. I understand you don’t want to be wasteful, but you don’t nneeed to use them very often - probably only a couple strips every year to double-check the readings of one of these -
Digital PH Meter PH-009 Pocket Size Water Quality pH Tester for Household Drinking Water, Hydroponics, Aquariums, Swimming Pools - Extra Two Packs of PH Calibration Solution Mixture https://www.amazon.com/dp/B00N7432II/ref=cm_sw_r_cp_tai_GBYSAbC90CFC3
this is the one me and my buddy bought. Instructions that came with it were basically junk... Very poor English.
There are quite a few of these meters on Amazon that look similar and having decent reviews (including people that use them for making beer). I'm not sure if they're all the same or what...
I treat it like any other pH meter: I rinse with distilled water and dry with kimwipes after each use. I put a small piece of sponge in the cap and bought some KCl (pH storage solution) off eBay. I wet the probe and sponge with the kcl before storing it.
the only advice i can offer is that this ph pen is very reliable and only $13 lol. im interested to see what others say because my friends plants has exactly the same issue https://www.amazon.com/Tester-PH-009-Digital-Meter-Calibration/dp/B00N7432II/ref=sr_1_1?ie=UTF8&qid=1466896770&sr=8-1&keywords=ph+pen
Here's a inexpensive one that comes with some testing solution. Make sure to keep the probe calibrated because they are sensitive.
Dude, just grab this. Trust me on this one.
edit: Is that Grizzly Adams on your test kit?
Test strips don't measure finely enough. Get something like this:
http://www.amazon.com/Tester-PH-009-Digital-Meter-Calibration/dp/B00N7432II/
http://www.amazon.com/gp/product/B00N7432II?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00 Just bought a cheap one to make sure I wasn't above 6. I'll probably upgrade later but for now this was just for piece of mind.
I don't know much about ph meters, but I'd go for the cheapest and if that's not good enough then you can know what you want from more expensive meter. This is pretty cheap: PH Tester PH-009 Digital pH Meter, Amazon
I use strips with similar ph range: Micro Essential Labs pHydrion
I like strips because one roll lasts for few years. It has some learning curve to use it properly, but easy and fast to use once you get the hang of it. Not as accurate, but good enough.