TDS meter on amazon:
https://www.amazon.com/Quality-MagicPro-Released-Premium-Handheld/dp/B01JQZT1EU?tag=greenrel-20
https://www.amazon.com/XLUX-Digital-Measurement-Resolution-Accuracy/dp/B01A0MHHBW?tag=greenrel-20
TDS meter on amazon:
https://www.amazon.com/Quality-MagicPro-Released-Premium-Handheld/dp/B01JQZT1EU?tag=greenrel-20
https://www.amazon.com/XLUX-Digital-Measurement-Resolution-Accuracy/dp/B01A0MHHBW?tag=greenrel-20
I have this Etekcity one for $12.99. Have had good results.
http://www.amazon.com/Etekcity-Digital-Handheld-Accuracy-0-9990/dp/B00EQGX2WC?tag=greenrel-20
@MacGyverStoner Just out of curiosity have you had a chance to use either one or both of these? Thanks