Hey guys I purchased a TDS meter from Amazon - HM Digital TDS-EZ TDS Water Quality Tester with Auto-off Function TDS-EZ. It was about $16.00 and seemed to have pretty good reviews. However, the meter works fine while use in tap water, RO/DI water, my FW tank water etc. When I place the meter in my Nano 28 gallon SW I get dotted lines only. I have emailed the manufacturer but no response. I think it is made in china ugh... but anyway.. Do you guys have any suggestions to why this meter is doing this only when it is placed in my SW tank? I have tried it and tried it.. washing it off and making sure its clean etc etc but dotted lines is all I get. There is nothing on the container for the meter showing why this may be or anything on thier website for trouble shooting etc.