I like ELOS test kits but will try another one next By Shawn on 12/8/2010
Shawn wouldn't recommend this product to a friend
I love all my other Elos test kits except this one, the colors are very translucent and half the time seem to change over the range of 4 drops. It is just difficult to get a solid reading. Is it 7 or 9. The nice thing is it has a 0.5*dkh resolution. I'll probably try the salifert
Not my favorite By Todd on 8/18/2010
Todd wouldn't recommend this product to a friend
I use Elos for all of my test kits except alk.
My test kit has a subtle at best color change, often it is very difficult to tell when the change happens.
I prefer Salifert for this (and only this) test.
Easy to Use By Kevin on 7/19/2010
Kevin would recommend this product to a friend
This is one of the simplest and most accurate KH kits I have used. Fill the vial with aquarium water and add drops until it turns yellow.....divide the drops by two and you have your DKH....What could be easier?