Aqua Master Substrate EC and Temp E300 Pro
Aqua Master Substrate EC/Temp E300 Pro Original price was: £149.99.Current price is: £124.99. Inc VAT
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Aqua Master pH and Temperature Meter P50 Pro
Aqua Master pH Temp Meter P50 Pro Original price was: £64.99.Current price is: £47.99. Inc VAT

Aqua Master Substrate pH/Temp S300 Pro 2

£129.99 Inc VAT

A specialist pH and temperature meter for coco coir, soil and moist substrates. Features a high-quality electrode, calibration indicator and precise readings.

Description

Aqua Master Substrate pH/Temp S300 Pro 2

The Aqua Master Substrate pH/Temp S300 Pro 2 is a specialist meter. It measures pH and temperature accurately in coco coir, compost, and other moist substrates, as well as liquids. This meter is perfect for growers who need precise readings directly from growing media, not just nutrient solutions.

The S300 Pro 2 features a modern, durable housing with intuitive, easy-to-use buttons. At its core is a high-quality pH electrode, designed for exceptional accuracy. It’s specifically engineered for substrate testing, where standard liquid probes often fall short. The meter arrives fully calibrated and ready to use, with batteries included.

The upgraded Pro 2 model includes a calibration indicator. It also displays results to two decimal places, giving you more confidence when adjusting feeding regimes or correcting substrate conditions. The electrode connects via a BNC connector, ensuring a secure, professional-grade connection and reliable performance.

Whether you’re working with coco coir, soil-based grows, or damp growing media, the Aqua Master S300 Pro 2 delivers dependable, repeatable measurements. For best results and longer electrode life, store the meter using KCL storage solution in the protective cap when not in use.

Key Benefits

  • Accurate pH and temperature measurement in substrates and liquids

  • Ideal for coco coir, soil & other moist growing media

  • High-quality pH electrode designed for substrate testing

  • Fully calibrated and ready to use

  • Calibration indicator for ongoing accuracy

  • Readings displayed to two decimal places

  • Robust housing with simple controls

  • Powered by standard AAA batteries

About brand

Aqua Master – Precision Water Testing for Hydroponics, Aquatics & Indoor Gardening

Aqua Master is a trusted global brand specialising in high-accuracy water testing instruments for hydroponics, horticulture, aquaculture and laboratory environments. Over time, the brand has become renowned for its reliable EC meters, pH meters, temperature probes and nutrient monitoring tools. As a result, growers can maintain perfect nutrient balance and water quality throughout every stage of plant development — from seedling to harvest.

Whether you're a UK indoor grower, commercial cultivator or hobbyist, Aqua Master delivers the precision needed to maximise plant health, nutrient uptake and crop yields. In particular, their meters perform exceptionally well in hydroponic systems, coco coir setups, NFT systems, DWC reservoirs and soil-based grows.


Why Choose Aqua Master for Hydroponics?

In hydroponics and indoor gardening, accurate nutrient and pH control is essential. Even small imbalances can result in nutrient lockout, stunted growth, deficiencies and reduced yields. Aqua Master meters are engineered to provide fast, dependable readings, helping growers stay in full control of their growing environment.

Their instruments are designed with:

  • High-grade sensors for superior accuracy
  • Waterproof and dust-resistant housings
  • Automatic temperature compensation (ATC)
  • Easy-to-read LCD displays
  • Replaceable probes and long service life

Whether you're running a home grow tent or a commercial-scale hydroponic operation, Aqua Master tools allow you to fine-tune nutrient solutions with confidence.


Aqua Master Product Range

🔹 pH Meters

Maintain optimal root-zone conditions with Aqua Master’s highly accurate pH testers, ideal for hydroponic reservoirs, soil runoff testing and nutrient solution preparation. Fast calibration and stable readings make them perfect for both beginners and professional growers.

🔹 EC & TDS Meters

Monitor nutrient strength precisely with Aqua Master’s EC and ppm meters, ensuring your plants receive the correct feed levels throughout their growth cycle — from propagation through flowering.

🔹 Combo Meters

All-in-one devices measuring pH, EC and temperature in a single unit — perfect for growers looking for streamlined nutrient monitoring without sacrificing accuracy.

🔹 Temperature & Water Quality Instruments

From reservoir thermometers to conductivity testers, Aqua Master provides a complete range of water analysis tools essential for hydroponics, aquaponics and indoor cultivation systems.


Designed for UK Growers & Professional Environments

Aqua Master meters are widely used across the UK, and Netherlands hydroponics industry thanks to their:

  • Compatibility with UK nutrient brands

  • Reliable performance in cold grow rooms and warm reservoirs

  • Calibration solutions available locally

  • Long-lasting build quality for commercial workloads

Whether you're growing in loft spaces, spare rooms, basements, greenhouses or warehouse environments, Aqua Master provides the data accuracy required for consistent success.


Benefits of Using Aqua Master Equipment

  • Improved nutrient uptake and plant growth
  • Reduced risk of pH shock and nutrient lockout
  • Optimised fertiliser efficiency
  • Higher yields and crop consistency
  • Faster diagnosis of plant stress issues

Accurate monitoring is one of the most powerful tools in any grower’s arsenal — and Aqua Master delivers professional-grade precision without complexity.


Ideal Applications

  • Hydroponics & aeroponics systems

  • Coco coir & soil growing

  • Aquaponics setups

  • Commercial horticulture

  • Aquarium keeping
  • Propagation & cloning environments

  • Research and laboratory testing


Why Buy Aqua Master from Us?

As a specialist UK indoor gardening retailer, we stock the full range of Aqua Master hydroponic meters and calibration solutions, offering:

  • Fast UK delivery
  • Competitive pricing
  • Expert grower support
  • Genuine manufacturer warranties
  • After-sales assistance

Whether you're upgrading your grow room equipment or building a complete hydroponic system from scratch, Aqua Master instruments provide the accuracy and reliability you need to succeed.

Shipping & Delivery

DELIVERY TIMEFRAME

We aim to process and dispatch all orders within 2 working days of being placed. Wherever possible, parcels are sent on a next working day service to ensure you receive them quickly and reliably.

When your order is dispatched, you will receive a confirmation email with tracking information so you can closely monitor your delivery every step of the way.

Please Note: Delivery times may slightly vary during busy periods, or due to courier service disruptions. Rest assured, we always do our best to get your order to you promptly.