Bluelab Digital pH Pen aquarium-supplies add 1/2 cup of kelp

add 1/2 cup of kelp meal to 20L of clean water and let soak for 24 hours

Made of stainless steel and anodized aluminium

you can ensure optimal nutrient availability for your plants by maintaining the right pH range in your growing medium

a unique blend of carbohydrates

Spectrum Labs has been the worldwide industry leader in human urine research and development for over twenty years

Bluelab Digital pH Pen aquarium-supplies add 1/2 cup of kelpIntroducing the Digital pH Pen By Bluelab The Bluelab pH Pen helps monitor the nutrient level in your plant's solution to ensure healthy growth. The pen measures both the pH and temperature of the solution and has a backlit LCD display for easy reading. It also has a successful pH calibration indicator and is fully waterproof for easy use. The temperature of the solution should be kept between 18 22C for optimal growth. This handy tool is powered by a