Can Filter Pre-filter 50 LED The Bluelab pH Probe has

The Bluelab pH Probe has a double junction reference which provides a longer life than many other pH probes and is a gel filled non-refillable probe

an ideal wet/dry cycle and also provides excellent longevity

and chelated iron resolve nutrient deficiencies

Content: 10 sticky traps - 10 closure strips

Can Filter Pre-filter 50 LED The Bluelab pH Probe hasThis Can Filter Pre filter is a replaceable, mesh like fabric sleeve that wraps around the outside of a Can Filter activated carbon filter. It acts as the first line of defence to trap dust, debris, and pollen, preventing them from clogging the carbon pores and extending the overall life of the main filter Life Extension: By trapping contaminants, it prevents the main carbon filter from becoming overloaded with dust, keeping it effective longer. High