http://www.aquaessentials.co.uk/index.php?main_page=product_info&products_id=1990
Any body tried one?
I like the idea, because the color of the drop checker can change quite a bit, thickness of the glass, different spectrum etc... Mine never look the same when I take it out the water. But that way it sound good to me, it make sense on the paper. But does it really work? I am tempted to order one...
Any body tried one?
I like the idea, because the color of the drop checker can change quite a bit, thickness of the glass, different spectrum etc... Mine never look the same when I take it out the water. But that way it sound good to me, it make sense on the paper. But does it really work? I am tempted to order one...