Ok, for those guys out there who aren't so good with colours (I actually do have deuteranomaly) I absolutely hate testing with anything that requires me to compare colours.
I already picked up a digital pH meter and digital TDS
meter (for incoming water) but for the ammonia, nitrite, nitrite and alkalinity I'm still stuck with those "compare the colours" testing methods. (Currently using my girlfriend's eyes and an API kit).
Are there any other good testing methods out there (that don't cost too much!) that don't require me to compare colours?