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Welcome to Our Planted Aquarium Fertilizer Inventory AquariumFertilizer.com carries water soluble agricultural grade fertilizers and water conditioners. We carry the nutrients required by all plants: Macro Micro Nutrient Mix, similar to PMDD; Micro Nutrients in dry and time release Substrate Root Zone Tablets; calcium compounds for water conditioning including Barr’s GH Booster; and 3 chelated iron compounds. We also carry Graduated Dispenser bottles for ease of mixing and dosing that can be purchased in combination with fertilizers at a discount. When you buy 5 of any single fertilizer you will automatically receive a sixth of that item free of charge. Shipping is by USPS flat rate priority mail. Up to 6 lbs can be shipped by flat rate envelope and up to 20 lbs goes in a medium flat rate box. Information about shipping costs and delivery time is available in our FAQ page. Information about international shipping is also available in the FAQ page. There is a strict limit of 4 lbs that can be shipped internationally in a flat rate envelope.

All of our aquatic plant foods have minimal impurities, and are suitable for the do-it-yourselfer with experience in handling chemicals. Most are available in 1 lb. quantities.  Please do not ask to be sold or sent fertilizers in smaller quantities.
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Barrs GH Booster

Barrs GH Booster

Tom Barr's general water hardness booster contains: 3 parts Potassium Sulfate, 3 parts Calcium Sulfate, 1 part Magnesium Sulfate by weight. 1 lb.  One Tablespoon or 16 grams will raise the GH of 20 gallons of water by 3 degrees or 1 meg/liter.


More Information      $ 8.00    Order:

Calcium Chloride

Calcium Chloride

Calcium Chloride
1 lb. CaCl2
Calcium is important for cell wall strength and thickness of stems. Chloride is used for photosynthesis.


More Information      $ 7.50    Order:

Calcium Nitrate

Calcium Nitrate

Calcium Nitrate
1 lb. CaNO3
Provides calcium and nitrates in a water soluble form. Potassium nitrate alternative for international customers. 19.0% - 15.5%


More Information      $ 4.00    Order:

Calcium Sulfate

Calcium Sulfate

Calcium Sulfate
1 lb CaSO4
AKA Gypsum supplies calcium to plants without increasing alkalinity.


More Information      $ 4.00    Order:

Dolomite (Calcium Carbonate with Magnesium)

Dolomite (Calcium Carbonate with Magnesium)

Dolomitic Calcium carbonate 1 lb
A magnesium source that lowers  acidity / increases alkalinity. 


More Information      $ 4.00    Order:

Graduated Dispenser Bottle

Graduated Dispenser Bottle

16 ounce (480 ml) graduated dispenser bottle that is perfect for measuring and pouring fertilizer into your aquarium. Small measuring chamber doses in 5 ml, 15 ml and 30 ml.


More Information      $ 8.00    Order:

Macro Mix

Equal part mixture by weight of KNO3, KNO4, MgSO4 and MKP


More Information      $ 7.00    Order:

Magnesium Sulfate

Magnesium Sulfate

Magnesium Sulfate
1 lb. MgSO4
This is also known as Epsom Salts. MgSO4 helps improve flower blooming; enhances a plant's green color; and can even help plants grow bushier.


More Information      $ 4.00    Order:

Mono Potassium Phosphate

Mono Potassium Phosphate

Mono Potassium Phosphate 1 lb.
MKP or KH2PO4
0-51-34
Phosphates help convert other nutrients into usable building blocks for growth. It is a component of the complex nucleic acid structure of plants which regulates protein synthesis; cell division and development of new tissue.


More Information      $ 10.00    Order:

Nutritrace CSM and Graduated dispenser bottle

Nutritrace CSM and Graduated dispenser bottle

Nutritrace CSM with boron 1 lb plus 16 oz (500 ml) graduated dispenser bottle


More Information      $ 25.00    Order:

Potassium Nitrate

Potassium Nitrate

Potassium Nitrate
1 lb KNO3
13.5-0-46.2
Potassium is an essential plant nutrient and is required in large amounts for proper growth and reproduction.

International customers: Consider buying Calcium Nitrate and Potassium Sulfate instead. Potassium nitrate is an oxidizer. We will not ship more than 4 lbs of potassium nitrate outside the USA or Canada. Aquariumfertilizer.com has a permit filed with the Canadian Department of Natural Resources.



More Information      $ 5.00    Order:

Potassium Sulfate

Potassium Sulfate

Potassium Sulfate
1 lb. K2SO4
0-0-50
Potassium is an essential plant nutrient and is required in large amounts for proper growth and reproduction.



More Information      $ 5.00    Order:

Substrate Root Zone Tabs

Substrate Root Zone Tabs

Custom made root tabs containing 20 trace elements in a time release formula. 10 tabs per package. Use by placing two tablets about 2" under the roots of one large plant; one tablet under one medium plant; or one tablet under 2-3 small plants. The tablets will provide micro nutrients for 3-4 months.


More Information      $ 5.00    Order:

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