Hydro Flow Vinyl Tubing Black 1/4” ID-3/8” OD 100’ Roll organic It is best suited for

It is best suited for seed germination and propagation indoors

It is easy to use and can be applied throughout the growing season to ensure optimal plant nutrition

You can use your choice of hydroponic media (sold separately) such as clay pebbles Number 4 perlite rockwool mini cubes coco chips etc

Auto-off 30 seconds after stable measurement

Each convenient 20mL packet helps calibrate your testing equipment to ensure precise readings

Hydro Flow Vinyl Tubing Black 1/4” ID-3/8” OD 100’ Roll organic It is best suited forPremium excellent quality vinyl tubing. Made in the USA. Available sizes 3 16 in ID 1 4 in OD 100 ft 1 4 in ID 3 8 in OD 100 ft 3 8 in ID 1 2 in OD 100 ft 1 2 in ID 5 8 in OD 100 ft 3 4 in ID 1 in OD 100 ft 1 in ID 1. 25 in OD 50 ft