1 7

Apera Instruments GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II - style: pH/EC/ppm+ORP

Apera Instruments GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II - style: pH/EC/ppm+ORP

$340.90 USD
$340.90 USD
Sale Sold out
Taxes included. Shipping calculated at checkout.

About this item

  • Lab-grade instrument designed specifically to meet growers' needs and habits
  • Measures pH, EC, 700ppm, 500ppm, ORP, and temperature with premium probe technologies, ensuring high accuracy and durability with minimal maintenance
  • Grower-friendly calibration workflow on an HD backlit screen allows you to finish 2-point calibration within a minute
  • Replaceable combo probe with double junction pH sensor and titanium EC sensor, ORP probe included for ORP (redox) test
  • Electrode condition indicator and calibration reminder function help you perform proper maintenance in a breeze

Low stock: 10 left

View full details

Reviews

  • ⭐⭐⭐⭐⭐

    Megan Carter — Portland, Oregon

    I found several useful gardening essentials at SproutNest for my patio and raised beds. The items were straightforward to use and helped me keep my tools, pots, and everyday plant-care routine better organized. I would gladly browse the store again when preparing for my next planting project.

  • ⭐⭐⭐⭐⭐

    Daniel Brooks — Austin, Texas

    SproutNest offers a practical selection for everyday garden care. I chose a few watering and hand-tool items, and everything was easy to understand and fit naturally into my usual routine. The variety made it convenient to find useful supplies for different jobs around the yard.

  • ⭐⭐⭐⭐⭐

    Lauren Mitchell — Denver, Colorado

    I like that the products feel approachable for someone building a garden one step at a time. I picked out supplies for repotting and caring for my outdoor plants, and they have made regular maintenance feel simpler and more manageable. The store was also easy to browse.

  • ⭐⭐⭐⭐⭐

    Jason Reed — Raleigh, North Carolina

    I was looking for practical supplies to help organize my seasonal gardening projects. The selection covered several everyday needs, from planting and pruning to watering and storage. It was convenient to compare different options and find products suited to my garden space.

New Arrivals

View all

FAQ

How do I choose the right gardening product for my needs?


Review the product description, dimensions, materials, intended use, and included components before ordering. Consider your available space, plant type, soil conditions, and gardening task. If you need additional information, contact us before placing your order.

Are your products suitable for both indoor and outdoor gardening?


Some products are designed for indoor use, some for outdoor use, and others can be used in both settings. Please check the individual product description for usage recommendations, materials, weather resistance, and care instructions.

How long does order processing and delivery take?


Processing and delivery times vary depending on the product, destination, carrier, and seasonal demand. Estimated shipping information may be provided during checkout or in your order confirmation. Please see our Shipping & Delivery Policy for further details.

How can I track my order?


When tracking becomes available, you will receive a shipping confirmation email containing the tracking information. Tracking updates may take a short time to appear after the carrier receives the shipment.

Why did I receive only part of my order?


Orders containing multiple items may be shipped separately due to product availability or fulfillment arrangements. Each shipment may have its own tracking information. Receiving items in separate packages does not necessarily mean that any part of your order is missing.

Can I change or cancel my order after placing it?


Contact us as soon as possible if you need to change or cancel an order. We will try to assist, but changes or cancellations cannot be guaranteed once processing or shipment has begun. Please confirm your products, quantities, and delivery address before completing checkout.

What should I do if my item arrives damaged, defective, or incorrect?


Contact us promptly at ionalewblopakq@gmail.com with your order number, a description of the issue, and clear photographs of the item, packaging, and shipping label. Keep the item and all original packaging until our support team provides further instructions.

Can I return an item if it is not suitable for my garden?


Eligible products may be returned in accordance with our Return & Refund Policy. Return conditions, time limits, exclusions, and instructions may vary. Please review the policy before initiating a return, and do not send an item back without following the provided return procedure.

How should I care for and store gardening tools and accessories?


Follow the care instructions supplied with the product. In general, remove soil and moisture after use, allow tools to dry fully, and store them in a clean, sheltered location. Product materials differ, so always follow any item-specific cleaning, maintenance, and storage guidance.

How can I contact SproutNest?


You can email us at ionalewblopakq@gmail.com or call +1 (936) 260-5549. When contacting us about an order, please include your order number and the email address used during checkout so we can assist you efficiently.

Blog posts

View all
  • The Secret Life of Pruning Shears: Clean, Sharp, and Ready to Cut

    The Secret Life of Pruning Shears: Clean, Sharp...

    Learn how to clean, disinfect, sharpen, and maintain pruning shears for healthier gardening and cleaner cuts. This practical guide covers blade care, lubrication, storage, and common maintenance mistakes.

    The Secret Life of Pruning Shears: Clean, Sharp...

    Learn how to clean, disinfect, sharpen, and maintain pruning shears for healthier gardening and cleaner cuts. This practical guide covers blade care, lubrication, storage, and common maintenance mistakes.

  • The Root-Rot Trap: How to Grow Plants in Pots Without Drainage Holes

    The Root-Rot Trap: How to Grow Plants in Pots W...

    Learn how to prevent root rot in pots without drainage holes using smarter container setups, proper watering habits, and well-structured soil. Discover how to combine decorative planters with healthier root...

    The Root-Rot Trap: How to Grow Plants in Pots W...

    Learn how to prevent root rot in pots without drainage holes using smarter container setups, proper watering habits, and well-structured soil. Discover how to combine decorative planters with healthier root...

  • The Secret Behind Chunky Aroid Soil: Air, Water, and Healthy Roots

    The Secret Behind Chunky Aroid Soil: Air, Water...

    Learn how to create chunky aroid soil that balances moisture, drainage, and airflow for healthier Monstera, Philodendron, and Anthurium roots. Discover practical mixing ratios and adjustment tips for different indoor...

    The Secret Behind Chunky Aroid Soil: Air, Water...

    Learn how to create chunky aroid soil that balances moisture, drainage, and airflow for healthier Monstera, Philodendron, and Anthurium roots. Discover practical mixing ratios and adjustment tips for different indoor...

1 3
View all