API FRESHWATER MASTER TEST KIT DENNERLE The cartridge works with a

The cartridge works with a mini regulator (not included) with or without electrical switch as well as hand-on bracket or a cartridge stand (not included)

magnetically coupled design

For this product to be effective it needs to be used as directed below

with a maximum fluctuation of 0

the faster you hear about an unexpected issue the more successful you will be as an aquarist

API FRESHWATER MASTER TEST KIT DENNERLE The cartridge works with aThe API FRESHWATER MASTER TEST KIT measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high range pH, ammonia, nitrite, and nitrate. With scientific accuracy for professional results, the reusable FRESHWATER MASTER TEST KIT comes with 4 glass test tubes with snap tight caps and a convenient holding tub for easy storage. Also includes a step by step instruction booklet with a color chart that provides