Yeah I have liquid tests, but what I am after is a good reliable pen or probe? Something that gives me instant readingsCrustyDusty said:I use NTlabs Aquarium Test Kit. It’s a liquid test kit that my LFS usually has in stock. Five drops of pH reagent into the test tube, give it a shake and the pH reading is instant.
It tests for the main six parameters and the pH test is effortless and easy to read.