Bluelab

Why Bluelab

A lot of the problems you'll chase in a hydroponic system come back to pH or EC being out of range somewhere, though plenty of others turn out to be environmental rather than chemical. Either way, you genuinely can't tell the difference without a meter you trust. That's why Bluelab ends up in most serious Australian setups, they've been making them for decades and the probes are actually replaceable rather than tossing the whole unit when one wears out.

The Combo Meter is the one most growers reach for first, it reads pH, EC and temperature off a single probe, which covers everything you'd otherwise need two separate devices for. If you only want pH, the pH Pen does that one job well and costs less. Either way, calibrate at the start of each grow cycle with fresh solution from a sealed sachet, an out-of-calibration meter will quietly feed you wrong numbers for weeks before you notice something's off.

For a full breakdown of target ranges and testing routine, our pH and EC guide covers what to actually do with the readings once you've got them.

Everything on this page is light, so weight is almost never what decides free shipping here, only your order total. Free shipping runs on three tiers to VIC, NSW, QLD, SA and ACT: $150 or more up to 3kg, $250 or more from 3 to 5kg, and $350 or more from 5 to 12kg. Most Bluelab orders sit well under 3kg, so the $150 tier is the one that usually applies.

Frequently Asked Questions

How often should I calibrate my Bluelab meter?
For home growers, calibrating at the start of each grow cycle is genuinely enough for most setups, more often only really matters if you're testing multiple times a day or running a commercial operation. Always use fresh calibration solution rather than an opened sachet that's been sitting around, and recalibrate sooner if your readings start looking off.

Do I need both a pH and EC meter, or will a combo do?
A combo meter covers both from one probe, which is genuinely enough for most home setups. Separate meters are really only worth it for larger commercial operations.

Why does my Bluelab reading drift over time?
Usually means it's due for calibration, or the probe needs cleaning. Storage solution between uses keeps the probe accurate for longer.

What's the difference between the Combo Meter and the pH Pen?
The Combo Meter reads pH, EC and temperature together. The pH Pen reads pH and temperature only, it's the cheaper option if EC isn't something you need to track yet.

Do Bluelab products qualify for free shipping?
Yes, and usually at the lowest tier. Almost everything here weighs under 1kg, including the Pro Controller and PeriPods, so an order of $150 or more ships free to VIC, NSW, QLD, SA and ACT.