(via https://www.youtube.com/watch?v=yj7VPUnurss) <a href="http://www.tomoson.com/?code=TOPd5ba41682407869bcf5d4a4cf896af35" rel="nofollow"><img style="display: none" src="http://www.tomoson.com/images/front/pixel.png" /></a> These were a bit hard for Vito to see. He’s blue-yellow color blind, and the strips go alone a blue-yellow range. Thankfully, I am not color blind and did not have this issue! There is a handy chart on the back to compare what the colors mean. Our tap water was definitely more acidic than I thought it would be! Good thing we drink mostly bottled anyway. They can keep developing over a minute or so after you remove them from the solution, we found, so be patient :) You can find them here: https://www.amazon.com/SelpHbalance-Drinking-Alkaline-High-Quality-Accurate/dp/B013HQYVR6/ref=sr_1_cc_3_a_it?s=aps&ie=UTF8&qid=1474897659&sr=1-3-catcorr&keywords=selphbalance <a href="http://www.tomoson.com/?code=BOTTOMd5ba41682407869bcf5d4a4cf896af35" rel="nofollow"><img style="display: none" src="http://www.tomoson.com/images/front/pixel.png" /></a>