Aquapro over-the-rim drop checker

We and our colleages at Aquapro are proud to present this beautiful over-the-rim drop checker so you can monitor your CO2 levels in style without having to deal with all the inconveniences of an in-tank CO2 monitor. The super low profile design looks great with any rimless tank, and is the best possible choice for smaller NANO aquarium where space is limited. Since the drop checker and indicator solution are held outside your tank, it will never fall in and the indicator solution will never mix with tank water giving your the most accurate readings forever!
 
Never gets dirty, grungy or covered with algae. No need for cleaning!
Thick, hand blown, high quality glass is beautful and durable
Will never fall off into your tank or get lost
Accurate readings without the possibility of contamination with tank water 
Works perfectly with our lab-grade indicator solution which theoretically never needs to be changed. 
Designed to compliment beautiful rimless aquariums where it becomes virtually invisible 
Perfect for Nano Tanks where space is at a premium as it takes up almost no space inside the aquarium
Always visible at a glance - will never be covered with plants, dirty glass, algae, hard water stains or anything else inside an aquarium
No suction cups to deal with
 
This beautiful accessory is designed for rimless tanks. This will fit most small rimmed tanks (10 gallon or smaller) and may be fitted after filing down some of the interior flange. Larger rimmed tanks will need one of our great in-tank drop checkers. 
 
As always, we, with our partners at Aquapro are committed to developing new and innovative products for your planted aquarium while offering affordable, top-of-the-line alternatives to egregiously over-priced products without sacrificing quality, functionality, or aesthetics. Check out our other Aquapro branded products for best some of the highest quality hardware as well as ingenious and unique gadgets at a fair price! Always a notch above - you won't find these on Amazon...