Glass Drop Checker Kit with pre-Mixed 4dKH & pH Reagent, 3-Minutes' Setup, 3 Seconds to Read Result,Fastest Way to Ensure Sufficient Co2 in Planted Aquarium & Color Change Reflects CO2 Level,1 Pack

This is a pretty drop checker that works as expected. The suction cup is staying put, which is good.

Description says the kit comes with a 2ml syringe but I didn't get one. Also the reagent needs 4dkh solution which does not come with this kit which they should've noted in the description as well because the reagent added with tank water does not give accurate results.

Please don't day that you will give a syringe. That makes me feel unsure of this product. The quality of the glass seems good. It says to add 15 drops not 3. We will see how accurate this is.

I wa struggling trying to put the suction piece and it easily broke!!!he suction cap wont attached easy, you half the risk of breking it while attachin it to the glass

Good price fast shipping

As expected