Salifert Nitrate Test Kit

[christyf5]

Anyone that has the Salifert NO3 kit, can you tell me what kind of vial it comes with? Is it the cylindrical one or the one with the square bottom?

I just realized that it totally makes a difference in the results based on which one you use. I'm pretty sure mine came with the square bottomed one but eventually it just made it into the vial pile and I've been using a cylindrical one thinking it doesn't matter. Turns out it does.

So I might have 25ppm nitrates or I might have 5-10ppm.

Thanks