Hey guys, I called my LFS to see if they had any ammonia test that's compatible with Amquel+ and she said there wasn't one at all. I told her like what the bottle said on the back and that there is suppose to be one on the website so she looked it up to see if she could get it for me. Then she said she would call around and call back but they fact that they say you have to buy THEIR test kit to get a correct reading made her a little leery of the products. Amquel+ has been the only thing that has consistently worked with my high tap water nitrates so using another product like prime (which I tried) isn't an option. I didn't realize that the only test that is suppose to work is theirs I thought it just had to could be something like theirs, powder or salicylate reagents (except API) like the bottle says. I'm not comfortable using the apI if I may be getting false readings. Id just rather be sure. Iv been using the test anyway since I don't have another and right now it usually stays pretty light but not quite 0 when I use it. Id say between 0 & .25 sometimes leaning towards .25 but not sure if that's right or wrong. What do you guys think? Do all the Amquel+ users buy the kit from the site?