$5 added to this product to cover dangerous goods shipping cost, product cost is $5 less instore.

PH Up & Ph Down are tank controllers that assist in reaching the desired pH level.

When preparing nutrients, or regularly monitoring your reservoir or tank, you should always check your pH levels to ensure that the pH stays within an acceptable range for your plants.

When pH levels become too high, nutrients become non-bioavailable, a phenomenon commonly referred to as ‘nutrient lockout’.

Accordingly, pH control using pH Up & pH Down is essential to ensure that nutrients remain readily available for plant growth