APT 1 (APT Zero) is a powerful all-in-one aquarium fertilizer for new tanks, low-tech setups, and fish-heavy aquariums. It delivers essential nutrients without nitrates or phosphates—perfect for tanks using aquasoil or relying on fish waste as an additional nutrient source. ✅ APT products ship free on orders $20+ Ships Next Buisness Day.
Price range: $11.80 through $50.90
Slow-growing species like Anubias, Java Fern, and Java Moss often suffer from leaf holes and thinning due to nutrient deficiencies. These plants draw nutrients directly from the water column, not the substrate. APT 1 supplies key minerals like potassium and magnesium without overwhelming them with nitrates or phosphates—helping prevent algae while supporting strong, healthy leaf development.
Only APT comes with an integrated methodology and success system used by thousands of aquarists across 20+ countries.
The smarter way to start a planted tank.
APT 1 is a highly concentrated all-in-one liquid fertilizer developed for planted aquariums with higher fish loads or aquasoil-based setups. It delivers the full range of trace nutrients and potassium—while leaving out nitrates and phosphates, which are often supplied through fish food and organic waste.
Whether you’re starting a new tank or running a mature system with active bioload, APT 1 supports healthy plant growth while helping you maintain better water balance from day one.
APT 1 (APT Zero) – Balanced Nutrition Without Nitrates or Phosphates
The smarter way to start a planted tank.
APT 1 is a highly concentrated all-in-one liquid fertiliser developed for planted aquariums with higher fish loads or aquasoil-based setups. It delivers the full range of trace nutrients and potassium — but leaves out nitrates and phosphates, which are often supplied through fish food and organic waste.
Whether you’re starting a new tank or running a mature system with active bioload, APT 1 supports healthy plant growth while helping you maintain better water balance from day one.
Zero Nitrates & Phosphates – Ideal for tanks where these nutrients come from fish waste
3× more concentrated than conventional formulas*
2× more potassium for color development^
Supports early-stage tanks with aquasoil or active substrates
Perfect for higher bioload systems and aquariums focused on fish
*Compared to older-generation aquarium fertilizers
^Relative to standard potassium dosing per ml
Dose: 3ml per 100L daily
Format: 300ml bottle with calibrated pump (1ml per press)
Duration: ~3 months for a 115L / 30-gallon tank
Also available in larger sizes
| Nutrient | Concentration |
|---|---|
| Soluble Potash (Kâ‚‚O) | 5.5% |
| Magnesium (Mg) | 0.85% |
| Iron (Fe) | 0.10% |
| – Chelated Iron (Fe) | 0.10% |
Derived from: Potassium Sulphate, Potassium Chloride, Magnesium Sulphate, DTPA Iron, EDTA Iron, EDDHA Iron
What is APT 1 best used for?
APT 1 is ideal for tanks with high fish load, aquasoil substrates, or systems where nitrate and phosphate levels are already naturally present. It’s also perfect for new aquariums where algae prevention and stability are top priorities.
Is it suitable for long-term use?
Yes — many experienced hobbyists use APT 1 long-term in tanks with balanced bioloads. It provides essential potassium and trace elements without overloading the water column.
Can I switch to APT 3 later?
Absolutely. Many aquarists start with APT 1 and switch to APT 3 once the tank matures or plant density increases. The two formulas are designed to be interchangeable based on tank needs.
        APT Dosage Calculator
