Hydrodynamics International

Click here to view the Hydrodynamics International feed chart.

Unlike our competition, we never buy liquidated inventory or old, deeply-discounted, soon-to-be-expired nutrients. We receive new products every few days, so when you buy from GYOstuff, rest assured you’re buying only the freshest nutrients for your plants.

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Clonex Rooting Gel, 15 ml Packet Clonex Rooting Gel, 100 mL Clonex Rooting Gel, 250 mL
Clonex Rooting Gel, 15 ml PacketClonex Rooting Gel, 100 mLClonex Rooting Gel, 250 mL

High-performance, standard-setting rooting compound.

High-performance, standard-setting rooting compound.

High-performance, standard-setting rooting compound.

$5.99

$23.95

$22.49

$49.95

Clonex Rooting Gel, 500 mL Clonex Rooting Gel, 1 Quart Clonex Clone Solution, 1 qt
Clonex Rooting Gel, 500 mLClonex Rooting Gel, 1 QuartClonex Clone Solution, 1 qt

High-performance, standard-setting rooting compound.

High-performance, standard-setting rooting compound.

Contains specific micro nutrients and root enhancing agents, carefully formulated to initiate and nourish new root cells.

$89.95

$168.95

$24.95

Clonex Clone Solution, 1 gal Clonex Mist, 100 mL Clonex Mist, 300 mL
Clonex Clone Solution, 1 galClonex Mist, 100 mLClonex Mist, 300 mL

Contains specific micro nutrients and root enhancing agents, carefully formulated to initiate and nourish new root cells.

Foliar spray root stimulator - for faster and healthier clones.

Foliar spray root stimulator - for faster and healthier clones.

$69.95

$10.95

$25.95

$23.99

Ionic Grow, 1 qt Ionic Grow, 1 gal Ionic Grow, 2.5 gal
Ionic Grow, 1 qtIonic Grow, 1 galIonic Grow, 2.5 gal

Specifically formulated for the green vegetative stage of growing plants.

Specifically formulated for the green vegetative stage of growing plants.

Specifically formulated for the green vegetative stage of growing plants.

$17.95

$39.95

$79.95

Ionic Grow, 5 gal Ionic Grow Hard Water, 1 qt Ionic Grow Hard Water, 1 gal
Ionic Grow, 5 galIonic Grow Hard Water, 1 qtIonic Grow Hard Water, 1 gal

Specifically formulated for the green vegetative stage of growing plants.

Specifically formulated for the green vegetative stage of growing plants in areas where hard water is an issue.

Specifically formulated for the green vegetative stage of growing plants in areas where hard water is an issue.

$143.95

$17.95

$39.95

Ionic Grow Hard Water, 2.5 gal Ionic Bloom, 1 qt Ionic Bloom, 1 gal
Ionic Grow Hard Water, 2.5 galIonic Bloom, 1 qtIonic Bloom, 1 gal

Specifically formulated for the green vegetative stage of growing plants in areas where hard water is an issue.

Specifically formulated for the reproductive and flowering stage of growing plants.

Specifically formulated for the reproductive and flowering stage of growing plants.

$79.95

$17.95

$39.95

Ionic Bloom, 2.5 gal Ionic Bloom, 5 gal Ionic Bloom Hard Water, 1 qt
Ionic Bloom, 2.5 galIonic Bloom, 5 galIonic Bloom Hard Water, 1 qt

Specifically formulated for the reproductive and flowering stage of growing plants.

Specifically formulated for the reproductive and flowering stage of growing plants.

Specifically formulated for the flowering and reproductive stage of growing plants in areas where hard water is an issue.

$79.95

$143.95

$17.95

Ionic Bloom Hard Water, 1 gal Ionic Bloom Hard Water, 2.5 gal Ionic PK Boost, 1 qt
Ionic Bloom Hard Water, 1 galIonic Bloom Hard Water, 2.5 galIonic PK Boost, 1 qt

Specifically formulated for the flowering and reproductive stage of growing plants in areas where hard water is an issue.

Specifically formulated for the flowering and reproductive stage of growing plants in areas where hard water is an issue.

Ionic PK Boost allows the grower easy control of the extra phosphorus and potassium that can lead to bumper yields.

$39.95

$79.95

$17.95

Ionic PK Boost, 1 gal Ionic PK Boost, 2.5 gal Ionic PK Boost, 5 gal
Ionic PK Boost, 1 galIonic PK Boost, 2.5 galIonic PK Boost, 5 gal

Ionic PK Boost allows the grower easy control of the extra phosphorus and potassium that can lead to bumper yields.

Ionic PK Boost allows the grower easy control of the extra phosphorus and potassium that can lead to bumper yields.

Ionic PK Boost allows the grower easy control of the extra phosphorus and potassium that can lead to bumper yields.

$39.95

$79.95

$143.95

Europonic Fossil Fuel, 1 qt Europonic Fossil Fuel, 1 gal Europonic Fossil Fuel, 2.5 gal
Europonic Fossil Fuel, 1 qtEuroponic Fossil Fuel, 1 galEuroponic Fossil Fuel, 2.5 gal

Promotes healthy soils and growing media which in turn help to produce lush plant growth and expansive root systems.

Promotes healthy soils and growing media which in turn help to produce lush plant growth and expansive root systems.

Promotes healthy soils and growing media which in turn help to produce lush plant growth and expansive root systems.

$19.95

$41.95

$99.95

Europonic Fossil Fuel, 5 gal GreenFuse Root Stimulator, 60 ml GreenFuse Root Stimulator, 120 ml
Europonic Fossil Fuel, 5 galGreenFuse Root Stimulator, 60 mlGreenFuse Root Stimulator, 120 ml

Promotes healthy soils and growing media which in turn help to produce lush plant growth and expansive root systems.

Highly concentrated, 100% organic root stimulator.

Highly concentrated, 100% organic root stimulator.

$159.95

$49.95

$79.95

GreenFuse Growth Stimulator, 60 ml GreenFuse Growth Stimulator, 120 ml GreenFuse Bloom Stimulator, 60 ml
GreenFuse Growth Stimulator, 60 mlGreenFuse Growth Stimulator, 120 mlGreenFuse Bloom Stimulator, 60 ml

Highly concentrated, 100% organic growth stimulator.

Highly concentrated, 100% organic growth stimulator.

Highly concentrated bloom stimulator.

$49.95

$79.95

$49.95

GreenFuse Bloom Stimulator, 120 ml Nitrozime, 8 oz Nitrozime, 16 oz
GreenFuse Bloom Stimulator, 120 mlNitrozime, 8 ozNitrozime, 16 oz

Highly concentrated bloom stimulator.

Marine algae extract.

Marine algae extract.

$79.95

$22.95

$39.95

Nitrozime, 1 qt Nitrozime, 1 gal Ionic Grow for Soil, 1 qt
Nitrozime, 1 qtNitrozime, 1 galIonic Grow for Soil, 1 qt

Marine algae extract.

Marine algae extract.

Vegetative formula - ideal for all container grown plants.

$74.95

$229.95

$17.95

Ionic Grow for Soil, 1 gal Ionic Bloom for Soil, 1 qt Ionic Bloom for Soil, 1 gal
Ionic Grow for Soil, 1 galIonic Bloom for Soil, 1 qtIonic Bloom for Soil, 1 gal

Vegetative formula - ideal for all container grown plants.

Flowering formula - ideal for all container grown plants.

Flowering formula - ideal for all container grown plants.

$39.95

$17.95

$39.95

MotherPlant Nutrients Part A, Qt MotherPlant Nutrients Part A, Gal MotherPlant Nutrients Part B, Qt
MotherPlant Nutrients Part A, QtMotherPlant Nutrients Part A, GalMotherPlant Nutrients Part B, Qt

Bio-organic hydroponic fertilizer formulated specifically for stock or "mother" plants.

Bio-organic hydroponic fertilizer formulated specifically for stock or "mother" plants.

Bio-organic hydroponic fertilizer formulated specifically for stock or "mother" plants.

$17.50

$34.95

$17.50

MotherPlant Nutrients Part B, Gal Europonic Rockwool Conditioning Solution, 1 qt Europonic Rockwool Conditioning Solution, 1 gal
MotherPlant Nutrients Part B, GalEuroponic Rockwool Conditioning Solution, 1 qtEuroponic Rockwool Conditioning Solution, 1 gal

Bio-organic hydroponic fertilizer formulated specifically for stock or "mother" plants.

Stabilizes and adjusts the pH of rockwool

Stabilizes and adjusts the pH of rockwool

$34.95

$17.99

$16.99

$39.99

$36.99

1 - 51 of 51 items