August 17, 201313 yr comment_536882 yes. http://www.cichlid-forum.com/articles/t ... s_life.php Report
August 17, 201313 yr comment_536888 Interesting. I recall someone (Caryl?) saying one club had a meeting where everyone brought along pH test kits of all different age and brands, they did a comparison and found that event he expired ones still were accurate. I finally used up my API pH test kit last week (about 3 years old) and I did a test side by side with the new one and they were both identical. I guess companies need to put a date on that kind of thing after which they no longer guarantee the accuracy, but I don't think I'd throw away a kit simply because it was a week or two past it's use-by date. Report
August 17, 201313 yr comment_536890 Yes it was me. My pH test stuff is years old and still gives the same reading as a pH meter (when I have the use of one) and newer tests :dunno: Report
August 17, 201313 yr Author comment_536901 It is my GH test which concerns me as I could not get it to give me a reading no matter how many drops were used even on rainwater. Report
August 17, 201313 yr comment_536907 We won a fancy test kit many years ago at a conference. I know all the other tests in that one are no longer accurate. Report
August 18, 201313 yr comment_536938 It is my GH test which concerns me as I could not get it to give me a reading no matter how many drops were used even on rainwater. You shouldn't be getting a GH reading on rainwater, unless you have limestone in your water tank!! Report
August 18, 201313 yr comment_536941 I've had API GH and KH kits go off. Last time I bought some I noticed they now have a use by date stamped on them. It used to be some obscure code printed on the bottle that let you figure out the manufacture date so you could look up the shelf life of the kits and figure out if yours had expired :facepalm: Report
August 18, 201313 yr Author comment_536942 The red test liquid is supposed to turn green but did not on any of my tanks or tap water or rainwater it just became a deeper and deeper red. I do regular water changes and I am fairly sure that tap water does not come out at over 2,000ppm. Report
August 18, 201313 yr comment_536948 If you're using API, check the date is less than 3 years old Each reagent bottle has a Lot # printed on the bottle. The last four digits are the month and year of manufacture. For example: Lot # 28A0102. = Jan 2002 http://www.fishlore.com/fishforum/test- ... users.html Report
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