Test Kits - Who makes the best?

[Lance]

I've used the Salifert, Elos, API, Seachem and Hagen. I'd have to say the Salifert is my favourite but in all honesty I think they are all kinda crappy.

[BlueAbyss]

I'm using the API test kits right now on my FW tank, I also have the Saltwater version, and they seem okay. I considered the Elos kit, but it's over 200 dollars. These retail around $50 but I got them for cheap from J & L.

[Mrfish55]

I use the Aquarium Systems regents (Instant Ocean branded) in my Medusa colorimeter and find it to be very accurate and easy to use, no guessing the color, it displays the actual reading.

[Black Phantom]

I'm sure we are all in the same boat. Look at your test under a MH bulb and it looks fine. Move over to a household fixture with a 3500K bulb and things are out of whack. Go outside or move to a window with good sun and you get another color reading.
I'm so confused
And unfortunately the manufacturer never includes instructions as to what your light source should be.

[BlueAbyss]

I think they are sort of standardized to a natural light at noon color temperature, I check mine in reflected light (off the white side of the building across the alley) from my big window.

[TrailFish]

I've used plenty of test kits over the years and always question their accuracy as well. I started using the Seachem test kits recently and the ones I've used come with a reference value. It make it a little easier to guage the colour especially if you put the reference value beside the tank sample.

Overall, test kits are a pain in the #@%!! A necessary evil.

[Black Phantom]

I'm going to give the Seachem ones a shot. I have to laugh because depending on my light conditions the nitrate in my tank is either at zero or everything in my tank should be dead