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General Hydroponics - Huge Savings! Save up to 13%


Huge Savings! Up to 13% off on General Hydroponics products at In The National Interest. Hurry! Limited time offers. Offers valid only while supplies last.



General Hydroponics GH94023 Float Valve with Barbed Fitting for Controllers
General Hydroponics GH94023 Float Valve with Barbed Fitting for Controllers
In Stock
$16.95

mpn: GH94023, ean: 0793094940238,

WaterFarm float valve with barbed fitting.Keeps WaterFarm modules topped off with correct nutrient level.WaterFarm float valve with barbed fitting. Keeps WaterFarm modules topped off with correct nutrient level. Replacement float valve for WaterFarm ...


General Hydroponics PH 7 Calibration Solution for Gardening, 1-Quart
General Hydroponics PH 7 Calibration Solution for Gardening, 1-Quart
SKU: #KV-AGEC-XV5S
In Stock
$17.74
$15.37
You Save: 13%

sku: KV-AGEC-XV5S, mpn: 722035, ean: 0793094015530,

General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use our reference solutions widely among many popular brands of meters using the NaCl scale. General Hydroponics technicians check each batch to ensure tha...


Replacement Diaphragm - For Dual Diaphragm Air Pump For GH2716 - General Hydroponics GH92713
Replacement Diaphragm - For Dual Diaphragm Air Pump For GH2716 - General Hydroponics GH92713
SKU: #FHHY0770300
In Stock
$22.99

sku: FHHY0770300, mpn: GH92713,

Replacement Diaphragms (2) for General Hydroponics Dual Diaphragm Air Pump (GH2716)Brand: General Hydroponics. - Part No.: GH92713. - UPC: 7930940927139. - Height: 0.3 in.. - Diameter: 2 in.. ...


General Hydroponics Dual Diaphragm Air Pump
General Hydroponics Dual Diaphragm Air Pump
In Stock
$63.00

mpn: GH2716, ean: 0877707810283,

General Hydroponics' Dual Diaphragm Air Pump is the only air pump in the world that is manufactured exclusively for use with hydroponics systems. This high output pump (320 GPH/24,800 cc/min capacities) has four adjustable 1/4" outputs or valves that...



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