I'm a bit overwhelmed by the number of Hanna Checker for phosphate.
I've opened a poll to see which one you guys use.
Could someone correct me if my understanding of these three checkers is wrong? And maybe suggest which one I should get?
The HI774 sounds like the best choice for someone who...
Used in inmacculate condition my Hanna PO4 Checker
Perfect working order.
$35
Free Shipping.
Some of my feedback.
https://www.reef2reef.com/threads/purchasing-from-duromega.421078/