Doing my testing yesterday while watching Price is Right. Opened a new box of alk test. Did the 4 drops and swirled for a bit, set everything down to turn my ro off that was filling the ATO. Picked up the sample container and looked at it and noticed it's not a greenish color like it normally is...even held it up to the light...it was crystal clear. I thought what the hell...something is wrong. That's when I noticed the top off the solution already...yep...looked in the bottle and it had a greenish tint to it!!!! **** YOU PRICE IS RIGHT!!!!