# Easy Potassium

**Brand:** Aquarium Co-Op
**Category:** Home & Garden > Plants > Aquatic Plants
**Taxonomy ID:** hg-17-1
**Google Category ID:** 5590
**Price:** $17.99
**Price Segment:** budget
**In Stock:** Yes

## Description

Potassium supplement for enhanced plant growth Easy-to-use measuring cap for accurate dosing Safe for fish, shrimp, and snails Potassium is a very important macronutrient for planted aquariums. If aquatic plants don't get enough of this nutrient, they can develop distinctive pinholes that are sometimes rimmed with brown or yellow. While Easy Green all-in-one fertilizer already contains plenty of potassium for most planted tanks, Easy Potassium is a useful supplemental fertilizer for people who are running high light planted tanks with CO 2 injection or have lots of potassium-hungry plants (like java fern and anubias). Please note that we have changed over to dosing caps. Pump heads are still available for purchase. 1. For the 500 ml (16.9 oz) bottle: — Use the measuring cap to dose(1 ml) per 10 gallons of water, 1-3 times a week — Each 1ml adds 2 ppm potassium to 10 gallons of water — Treats 5,000 gallons total 2. For the 120 ml (4 oz) bottle: — Dose 2 drops per gallon of water, 1-3 times a week — Each dose of 2 drops adds 2 ppm potassium to 1 gallon of water. — Treats 1,200 gallons total — Great for nano tanks under 10 gallons When in doubt, start low and increase the dosage after 2 weeks. Guaranteed Analysis: Soluble Potash (K2O) 9.12% — Derived from potassium sulfate and potassium citrate — NPK rating 0 - 0 - 9.12 Notes: — Please store the fertilizer upright in a cool, dry location away from children. The pump head (if using an older version) and dropper cap are not leak proof. For optimal shelf life, store out of light. — If you have the pump head version, keep the tip of the pump clean of debris. Wiping the pump tip after each use helps prevent a mineral crust from developing. If the pump gets blocked up, it can cause the fertilizer to spray in a random direction, so run the pump head under warm water until the blockage melts away. — Warning: Fertilizer can be irritating if it gets into your eyes, nose, or mouth, and it can cause stomach upset if swallowed. If you get Easy Potassium on your skin, rinse it off. If you get it in your eyes or mouth, rinse thoroughly for 15 minutes. For USA customers, reference the poison.org website. For Canadian customers, reference dpic.org

## Specifications

### Ingredients & Nutrition

| Specification | Value |
|---|---|
| Key Ingredients | Potassium, potassium sulfate, potassium citrate |
| NPK Rating | 0 - 0 - 9.12 |
| Soluble Potash Content | 9.12% |

### Performance

| Specification | Value |
|---|---|
| Benefits | Enhanced plant growth, treats potassium deficiency |

### Features & Construction

| Specification | Value |
|---|---|
| Product Form | liquid fertilizer |
| Safety | Safe for fish, shrimp, and snails |

### Dimensions & Volume

| Specification | Value |
|---|---|
| Volume | 500 ml (16.9 oz) or 120 ml (4 oz) |

### Usage & Instructions

| Specification | Value |
|---|---|
| How to Use | Dose via measuring cap or pump head |
| Storage | Store upright in a cool, dry location away from children and light |

## Variants

| Variant | Price | Available |
|---|---|---|
| 500ml | $17.99 | Yes |
| 120ml | $11.99 | Yes |

## Frequently Asked Questions

**Q: Is Easy Potassium by Aquarium Co-Op safe for my aquarium?**
A: Yes, Easy Potassium is safe for fish, shrimp, and snails. It is a supplemental fertilizer designed to provide essential macronutrients to your planted aquarium, though it can cause irritation if it comes into contact with your eyes, nose, or mouth, so it should be handled with care.

**Q: How do you use Easy Potassium for a 500 ml bottle?**
A: For the 500 ml (16.9 oz) bottle, use the measuring cap to dose 1 ml per 10 gallons of water, 1-3 times a week. Each 1 ml dose adds 2 ppm of potassium to 10 gallons of water, and one bottle treats 5,000 gallons total.

**Q: What is the recommended dosage for the 120 ml Easy Potassium bottle?**
A: For the 120 ml (4 oz) bottle, dose 2 drops per gallon of water, 1-3 times a week. Each dose of 2 drops adds 2 ppm of potassium to 1 gallon of water. This size is great for nano tanks under 10 gallons and treats 1,200 gallons total.

**Q: What are the key ingredients in Aquarium Co-Op Easy Potassium?**
A: Easy Potassium has an NPK rating of 0-0-9.12 and contains 9.12% soluble potash (K2O). This fertilizer is derived from potassium sulfate and potassium citrate to provide a macronutrient supplement for enhanced plant growth, particularly for high-light tanks or plants like java fern and anubias.

**Q: Is Easy Potassium worth the price for aquarium owners?**
A: Easy Potassium is priced at $17.99 for the 500 ml bottle and $11.99 for the 120 ml bottle, with a high consumer rating of 4.92/5. It is a valuable supplement for high-light planted tanks with CO2 injection or for correcting potassium deficiencies like pinholes on aquatic plant leaves.

**Q: How should I store Aquarium Co-Op Easy Potassium?**
A: For optimal shelf life, store Easy Potassium upright in a cool, dry location away from children and out of direct light. If you are using an older version with a pump head, wipe the tip after each use to prevent mineral crust buildup and debris blockages.

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Data verified March 2026.

Source: https://aquariumcoop.com/products/easy-potassium