What's your opinion on the Hanna low-range-ph-conductivity-tds-combo-pen-hi98129? Any thoughts on other testers?
https://www.bulkreefsupply.com/low-range-ph-conductivity-tds-combo-pen-hi98129-hanna.html
Thanks
https://www.bulkreefsupply.com/low-range-ph-conductivity-tds-combo-pen-hi98129-hanna.html
Thanks