Bluelab Guardian Monitor (Conductivity / Temperature / pH) Media This isn't slow-acting

This isn't slow-acting

UK manufactured to food-grade standards

Particularly well suited to spaces where simplicity

but if pH is all you need

that dark-cycle drop is where a tube heater earns its place

Bluelab Guardian Monitor (Conductivity / Temperature / pH) Media This isn't slow-actingBluelab 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