/challenges-projects/design-challenges/vertical-farming/b/blog/posts/automated-green-house-blog-13-1---ph-delivery-organic-egg-shell-based-mech-portionIt is a good idea to go organic with PH buffers, it works out quite cheap aswell. I worked with commercial chemical buffers in the past and have had a few finger print removing accidents, This Blog will cover how to make an safe and organic PH bufferen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/vertical-farming/b/blog/posts/automated-green-house-blog-13-1---ph-delivery-organic-egg-shell-based-mech-portionWed, 14 Oct 2015 20:50:40 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:3a86723f-3b4f-4474-b509-1d635289787fDAB1<p>Depending upon how often you need to test the Ph, look into the little paper strips used in swimming pools and hot tubs.</p><p>&nbsp;</p><p>They are one time use, but should be good enough for what you want to do.</p><p>&nbsp;</p><p>Or, you can set up a chemical pipet with phenolphalene drops to check PH the old fashion way.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=616&AppID=120&AppType=Weblog&ContentType=0" width="1" height="1">