Overview
The fertilizer granules are brown-black. Rich in nutrients to help plants grow well. Suitable for all types of aquatic plants and fish. Stabilizes the pH level in the water. Clears the water quickly (approximately 1 – 3 hours after setting up the tank). Supplements Phosphate; Sulfate to help plant roots grow strong. GEX green substrate does not need to be rinsed before use.
API gear is commonly used for freshwater planted tanks, nano aquascapes, and routine maintenance — always match capacity to your tank volume and livestock.
What to know before buying
- Confirm tank size, flow rate, or dosage matches your setup (check the manufacturer listing on Amazon).
- Compare the latest Amazon price with local shops — affiliate links do not change what you pay.
- Read recent buyer reviews for packaging, noise level, and long-term reliability.
Who this is for
Ideal if you run a planted freshwater tank or aquascape and want a proven api product with wide availability in the US and international Amazon marketplaces.