Very good quality and fast shipping. I ordered on Thursday and it arrived to my on Saturday! You do need to buy the 4DKH solution with this. You will be glad y ou did because GLA 4DKH solution is super good, I mean really good quality. You find it here,https://greenleafaquariums.com/products/4-dkh-lab-certified-analytical-standard-118ml.html
If you get these two its a winning combo. You cant ever go wrong with GLA. Loyal customer here since 2007:) Thanks guys!
Very good quality
Set this up with GLA 4DKH solution and it has been super responsive. Im sure all the glass vessels are the same so I think it has mostly to do with GLA's 4DKH drop checker solution. The 4DKH GLA makes is the most high quality accurate 4DKH solution I have used and I have used every single one. I tested the 4DKH with my HANNA instruments tester and its the most accurate 4DKH solution on the market. This is my 4th drop checker from GLA and Im always satisfied.