Hi all
a few days ago i got my new drop checker from a guy off Ebay .and i just want to make sure i have it working right .ok this is what i did .i could not get hold of any distilled water for love nor money . in the end i got some De-ionised water from a car shop .for £1.99 a Litre. i then found i could get a Litre bottle from wilkinsons for 54p . just my luck .Anyway i mixed some bicarbonate of soda in with the de-ionised water till i got a reading of 4 degrees KH water . i checked this with my KH test kit . i then added 3 drops from my PH kit till it went a dark blue color . heres some pics of how it looks going through its color change .do you guys think this looks ok .

the first pic is just after it was put in the tank . the next one is it starting to go from blue to green after about 2 hours . the last one is after 3 hours