Meters

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AirComfort + - Wireless Temperature & Humidity SensorAirComfort + - Wireless Temperature & Humidity Sensor
In Stock
Basic pH & EC Testing Kit
Basic pH & EC Testing Kit
Sale price£39.99
K-90598
In Stock
Growers Water Conditioning ToolkitGrowers Water Conditioning Toolkit
Growers Water Conditioning Toolkit
Sale price£159.99
K-9405
In Stock
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Budget pH Tester
Budget pH Tester
Sale price£17.99
90596
In Stock
Budget EC Tester
Budget EC Tester
Sale price£14.99
90597
In Stock
Aqualine - pH StickAqualine - pH Stick Angled
Aqualine - pH Stick
Sale price£63.99
811381
In Stock
Aqualine - EC StickAqualine - EC Meter
Aqualine - EC Stick
Sale price£64.99
811375
In Stock
Grow Gadgets Digital Hygrometer
Grow Gadgets Digital Hygrometer
Sale price£9.99
85351
In Stock
Grow Gadgets Digital Hygrometer with Probe
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Grow Gadget - Digital Scales (0.1g - 2000g)Grow Gadget - Digital Scales (0.1g - 2000g)
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Essentials Digital Moisture MeterEssentials Digital Moisture Meter
Essentials Digital Moisture Meter
Sale price£29.99
128091
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Aqua Master - P110 Pro EC-pH-Temp Combo PenAqua Master - P110 Pro EC-pH-Temp Combo Pen
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Aqua Master E50 Pro EC & Temperature MeterAqua Master E50 Pro EC & Temperature Meter
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Aqua Master P50 pH & Temperature MeterAqua Master P50 pH & Temperature Meter
Aqua Master P50 pH & Temperature Meter
Sale price£20.99
126393
In Stock
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Milwaukee pH51 Waterproof pH TesterMilwaukee pH51 Waterproof pH Tester (Angled)
Milwaukee pH51 Waterproof pH Tester
Sale price£34.95
90592
In Stock
Bluelab EC Pen - Temperature Compensated Digital EC Tester
In Stock
Bluelab V2 Truncheon CF/EC/PPM MeterBluelab V2 Truncheon Close-Up
Bluelab V2 Truncheon CF/EC/PPM Meter
Sale price£94.99
83693
In Stock
Bluelab pH Pen - Temperature Compensated Digital pH Tester
In Stock
Bluelab Combo Meter
Bluelab Combo Meter
Sale price£264.99
83702
In Stock
Bluelab Guardian Monitor (Conductivity / Temperature / pH)
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Bluelab pH Controller Connect
Bluelab pH Controller Connect
Sale price£595.99
83689
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Bluelab Connect Stick 2 - Wireless USB Data Receiver
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Bluelab Replacement pH Probe for Combo / Maestro Meters
In Stock
Bluelab Peripod (M3)Bluelab Peripod (M3) (Sideways)
Bluelab Peripod (M3)
Sale price£884.49
83687
Sold Out
Battery - 1.5V Button Cell - For Use With pH Testers
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Bluelab Pro Controller ConnectBluelab Pro Controller Connect
Bluelab Pro Controller Connect
Sale price£1,043.99
83688
In Stock
Bluelab pH Probe Cleaning and Calibration Kit
In Stock
Bluelab Conductivity Probe Cleaning Kit for EC/CF/PPM Truncheon
In Stock
Bluelab pH & EC Meter Cleaning and Calibration Combined KitBluelab pH & EC Meter Cleaning and Calibration Combined Kit
In Stock
Bluelab Guardian Monitor ConnectBluelab Guardian Monitor Connect
Bluelab Guardian Monitor Connect
Sale price£399.99
83709
In Stock
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Get Your Environment Right

Temperature

During the daytime, or lights-on period, you need to be aiming for temperatures of around 25° C (around 77° Fahrenheit).

Aim for temperatures of around 18° C during dark hours.

Humidity

Typical indoor plants need humidity levels that start high during the vegetative growth stages, getting lower as they progress towards harvest. When propagating cuttings, you'll need humidity levels of around 80% to nurse them through their most vulnerable stages and compensate for the lack of roots. In the later vegetative growth stages, plants thrive at around 70%. As they progress through the bloom stages, you'll need to ensure that moisture levels stay below 60% or you'll be at risk of encountering mildew and rot, which could cost you a big chunk of your crop.

A simple grow room humidity meter is an invaluble tool, and the Grow Tools Hygrometer is perfect for the job. It will provide information on both temperature and relative humidity.

Looking to Push Things Even Further?

If you want to get more in-depth, take a look at our blog on vapour pressure deficit. We stock an array of products that will assist you in tracking VPD, like the Dimlux Maxi Controller and Plant Camera, but you can dip your toe in the water with a bit of knowhow and an infrared thermometer.

Maintain Optimal Nutrients

pH

pH levels are an indication of the acidity or alkalinity of a given substance. In hydroponics, the pH of your solution affects the availability of nutrients, which is why we generally aim for a sweet spot of around 5.8. If you're running organic feeds, aim for around 6.5. Note that these numbers can vary depending on the particular nutrient range, so make sure you consult the label or feed chart first. The Essentials pH Meter is a great pH tester that gets the job done for a very reasonable price.

EC

EC, or electrical conductivity, gives you an insight into the levels of dissolved minerals in your feed. In short, the higher the EC, the more concentrated the nutrient is. The Bluelab Truncheon is one of the most popular EC meters out there; it's been a customer favourite for years, which is largely down to its accuracy and the fact that it's practically indestructible.

To see our full Grow Tools / Accessories range, click here.

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