4-in-1 pH, ORP, H2 & Temp Meter · Easy Garden YY-400 · Ultimate Water Quality Tester

The Easy Garden YY-400 4-in-1 Meter is the ultimate digital water quality tester that guarantees your cannabis plants absorb exactly what they need by instantly measuring pH, ORP, Hydrogen (H2), and temperature with pinpoint accuracy.

Picture this: you have spent a fortune on premium nutrients and carefully mixed your reservoir, but your plants still look sad, yellowing, and stunted. You are flying blind, relying on cheap test drops or guessing the water quality, leaving your roots vulnerable to nutrient lockout and nasty pathogens.

It is incredibly frustrating to put in all that hard work only to watch your yield suffer because the pH is slightly off or the oxygen levels in your water are breeding harmful bacteria. Every day you wait to fix your water chemistry, you are literally flushing money and potential harvest weight down the drain.

Enter the Easy Garden YY-400. This pocket-sized powerhouse completely changes the game by giving you lab-grade readings in seconds. By keeping your pH perfectly balanced and monitoring your ORP (Oxidation-Reduction Potential) to ensure a sterile, oxygen-rich root zone, you will unlock explosive vegetative growth and massive, resin-heavy buds.

What the Easy Garden YY-400 4-in-1 Meter includes

This device comes fully equipped so you can start testing your water immediately and get your grow room back on track.

• Digital 4-in-1 Tester: Accurately measures pH (0-14), ORP (±999mv), H2 (0-2400 ppd), and Temperature (0-60ºC).
• Built-in Batteries: Includes 3 x 1.5v (LR44) batteries so you are ready to test right out of the box.
• Compact Design: At just 183 x 37 x 37 mm, it fits perfectly in your hand or pocket for quick checks.

How your daily grow routine changes from now on

Gone are the days of messy liquid test kits and confusing color charts. Now, you simply dip the pen into your nutrient mix, and the crisp digital screen instantly tells you exactly what is going on. You will save precious time during your daily feeds and gain total peace of mind knowing your water is perfectly dialed in.

Whether you are running a complex deep water culture setup or just mixing nutes for your soil pots, this meter ensures your plants are drinking a perfectly balanced cocktail. You will notice faster growth, greener leaves, and a much smoother run from seed to harvest without the constant stress of invisible water issues.

Advantages and benefits you will notice from day one

• Because it features a highly sensitive multi-electrode, you can measure four critical parameters at once, which means you save money by not buying separate meters.
• Because it measures ORP (Oxidation-Reduction Potential), you can monitor the cleanliness of your water, which means you prevent root rot and keep your hydroponic system sterile.
• Because it includes a wide temperature range (0-60ºC), you get accurate readings regardless of the water temp, which means no more miscalculations that could fry your plants.
• Because of its compact size, you can easily carry it in your pocket, which means you can check your reservoirs anywhere, anytime with total comfort.
• Because it measures Hydrogen (H2) levels, you can ensure optimal water structure, which means better nutrient uptake and healthier, more vigorous roots.

Tips to combine it with other Pevgrow products

To get the absolute most out of your new meter, you need the right tools to adjust your water once you have your readings.

• Pair it with premium Hydroponic Nutrients to ensure your base mix is top-tier before testing.
• Use it alongside reliable pH Down GHE regulators to instantly correct any alkaline imbalances.
• Keep your grow room environment as dialed in as your water by using accurate measuring instruments for temperature and humidity.

Frequently Asked Questions

How often should I calibrate the pH meter?

For the best accuracy, it is recommended to calibrate your meter every 2 to 4 weeks, or whenever you suspect the readings might be slightly off. Always use proper calibration buffer solutions to keep the sensor sharp.

What is ORP and why does it matter for my plants?

ORP stands for Oxidation-Reduction Potential. In a grow room, especially in hydroponics, a higher ORP means your water is cleaner and has more oxygen, which prevents nasty pathogens like Pythium (root rot) from destroying your crop.

Is this meter waterproof?

The probe end is designed to be submerged in water to take readings, but the entire top unit is not fully waterproof. Be careful not to drop the whole meter into your reservoir!

Can I use this for soil growing?

Absolutely! While it is a lifesaver for hydro, soil growers use it to test the pH and quality of their nutrient water before feeding, as well as testing the runoff water to check the soil's health and nutrient buildup.

Personal Experience of Pevgrow’s CEO (Alan)

I used to think checking pH was enough, but once I started monitoring ORP with a 4-in-1 meter like this, my hydro runs went to the next level. I remember battling root rot in a DWC setup because my water was stagnant and I had no idea. Now, I dip this pen in, check the ORP, and if it is too low, I know I need to add some beneficials or oxygenate the water. It is super lightweight, the batteries last forever, and it just takes the anxiety out of mixing nutes. Just remember to rinse the probe with distilled water after every use so it stays accurate for your next session!