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Showing results for tags 'tds metres'.
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Hi all, I currently have two different brands of TDS metres - one that I use all the time (Xiao Mi) and a cheap no name one that is actually the same one that Mark Peggie (Mark's Shrimp Tanks) uses. Today, when I was doing my weekly water parameter check and water change, I decided to see if there was a difference in the TDS readings between the two metres. Well I was surprised to discover that there was a huge difference in the reading - the Xiao said 252ppm and the no-name said 203ppm. Which one should I believe? My GH is 6, KH is 1 and the readings were taken at the same time in the same sample of water so no temp difference. Neither of them mention anything about calibrating in the instructions so consequently I have not calibrate them. Has anyone else had the same situation? As I'm only keeping neocaridinas I guess the TDS is a little less critical but I would like to start keeping caridinas in the future, and if I am setting my water up to the wrong parameters it is going to cause some big problems. Any suggestions or info would be great!