Ive read all these posts with people confidently stating their amonia/nitrite/nitrate levels, yet when ive tested mine with the test kit i find it hard to match the colour in the bottle to the colours on the cards with any great accuracy. Any tips? Can i buy a meter that gives me a reading rather than having to rely on my dodgy visuals 

I use the test kits as a guideline to how the tank is behaving.

does it make a difference??? who knows. what im looking for is a test strip that you can just dunk in the water (or some of the water out of the tank) does anyone know of any of this type of thing you can buy in the uk??? i know you can get test strips for human urine that give you all sorts of levels of things, do they do them for fish??

