a bit confused which PH and PPM pens are good. There's a range of prices out there from a few quid to hundread of pounds. Can anyone give me an Amazon link with the best choice please?
As for ppm I use the blue labs tester but for some reason I can't find it on Amazon. Some of these things lately I've found lower cost at local hydro stores then amazon, if you have any I'd check there as well.
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Here are the ones I use: https://amzn.to/3otOYTi
https://amzn.to/3oxyTfg
Thanks Mr. Grow it, especially for the PPM pen!
Aspera has he best bang for your buck on ph pens and they work pretty good.
https://www.amazon.com/Apera-Instruments-AI311-Replaceable-2-00-16-00/dp/B01ENFOIQE/ref=mp_s_a_1_12?dchild=1&keywords=ph+pen+tester+for+water&qid=1607342727&sprefix=ph+pen&sr=8-12
As for ppm I use the blue labs tester but for some reason I can't find it on Amazon. Some of these things lately I've found lower cost at local hydro stores then amazon, if you have any I'd check there as well.
Thank you so much mwhite9829,
much obliged for that!