4hydro.com - Sunburst Hydroponics

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Newest Additions

?When your ?HM Digital Waterproof EC/TDS/Temp Combo meter needs a new sensor, this is the perfect fit. A Waterproof EC/TDS/Temp Combo Sensor.
The HM Digital Waterproof EC/TDS/Temp Combo meter is your one-stop shop for all kinds of testing in a variety of applications, including hydroponics, aquaculture, water purification, wastewater regulation, and more!
For a digital TDS meter than can go anywhere with you, check out this neat HM Digital Pocket-Size TDS Meter.
This sensor functions as the high-tech replacement Waterproof pH sensor for the compatible Waterproof pH Meter.
The HM Digital Waterproof pH Meter functions perfectly in a wide variety of applications, like water purification, hydroponics, wastewater regulation, and even aquaculture.
Save 16%
The HM Digital pH HydroTester is the perfect pH meter for anyone looking to test applications like gardening, water ionizers, drinking water, hydroponics, and more!
Save 16%
The RO-150 is a reverse osmosis water filtration system that removes 98% of all contaminants from 150 GPD of tap water, including chlorine.
The perfect addition to any compost tea, this product is loaded with carbohydrates, as well as proteins, organic acids, potassium, calcium, micronutrients, phosphorus, and magnesium.
Universal Cell Phone Illuminated Microscope with clip from Grower's Edge® makes sharing and storing magnified pictures of your plants a breeze.
$10.95 - $27.95
Specially formulated, derived from potassium hydroxide, and made with 36% soluble potash, CYCO pH Up helps you ensure optimal range of pH in your nutrient solutions by raising its total pH value.
$10.95 - $27.95
To get your maximum yield, you plants have to be able to absorb as many of the right nutrients as possible. Cyco pH Down is the product for you.
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Caster wheel set for Quest Dual Overhead Dehumidifier model 105, 110, 150, 155, 205, or 215,
Quest Dehumidifier replacement filter for the PowerDry 1300 and RDS10 Dehumidifiers.
Quest dehumidifier replacement filter for Overhead Units models 110 and 150.
Quest dehumidifier air filter for the PowerDry 4000, Dual Overhead units 105, 155, and 205.
The Quest PowerDry 4000 Pro Dehumidifier can dehumidify up to 22 gallons (176 pints) a day at 80ºF/60%RH, while consuming just 10 amps.

Featured Products

$15.99 - $44.99
Grow like the professionals! Nature's Nectar Nitrogen is part of a group of nutrients that let you determine the exact ratio of N (Nitrogen) - P (Phosphorus) - K (Potassium) best suited for your plants so you can customize your plants' nutrients yourself!
Built by Titan Controls, the Sunlight Supply EOS 1 Humidity/Dehumidity Controller is the complete solution for controlling the humidity levels in your grow room.
This fourth edition book is probably the best reference on the shelf for learning how to design and build a grow room and an aeroponics or hydroponics system from scratch.
High quality dry soluble plant supplement that contains 45% silicon dioxide to help tweak your nutrients to your own taste.
Save 16%
The ultimate additive addition to any grower's bloom regime, containing all the BLOOM additives required to enhance any garden.
Organic Miyashige Daikon Radish Seeds will become very large yet crisp and tender. Perfect for pickling, fermenting, or storage.
These Joshua Roth wire cutters are designed specifically for Bonsai wire. This durable, high-quality Japanese crafted tool is designed with a rounded head to prevent damaging the branch.
You can double the life of your pH tester when using Electrode Cleaning Solution on a regular basis.
Joshua Roth Leaf Trimmers (#1166) have Vinyl-wrapped handles to provide a secure grip.
The Florence Fennichio Fennel is a hearty plant that produces large blubs and has a crisp, juicy texture and pleasant flavor.
$11.75 - $127.95
B-52 Fertilizer Booster delivers complex B vitamins to your plants to help them cope with different environmental stresses.
2 x 4 Active Aqua flood tables are more sturdy than most others. They are made from durable black high-impact ABS plastic with UV resistance for long life.
The Sun Tube reflector works well as a regular horizontal light or it can supplement your existing garden light by being hung vertically at the edge of or into the canopy of your plants. The interior reflector can easily be removed for 360° light dispersion!
Hydro Flow (Ecoplus) Ebb & Flow Fittings Kit has been around for years and is the perfect solution to reduce leaks. The pieces push together to create a tight seal.
$2.99 - $3.29
Barbed connectors and valves are an efficient way to arrange hydroponic irrigation lines.
57 wide x 57 deep x 79 tall - Model GL145 GrowLab enclosure is a good fit for a 4' x 4' plant tray and works well with either a 600W or 1000W HID light system.