Bluelab Guardian Monitor (Conductivity / Temperature / pH) Media so if the worst happens

so if the worst happens

but if pH is all you need

You add it to your existing feed schedule

UK manufactured to food-grade standards

and built to last longer than cheaper single-layer alternatives

Bluelab Guardian Monitor (Conductivity / Temperature / pH) Media so if the worst happensBluelab Guardian Monitor (Conductivity Temperature pH) Complete Feeding, No Guesswork When growing hydroponically, it's essential to carefully monitor reservoirs to ensure that nutrients of the right strength, temperature and pH are delivered to your plants. The Bluelab Guardian is an all in one solution to monitoring every essential parameter. Should levels ever drop below, or rise above, pre determined values, then the easily programmed visual alarm