What is the Aquarium Dosing Calculator?
The Aquarium Dosing Calculator allows aquarists to precisely calculate the required volume of liquid fertilizers, water conditioners, or liquid medications needed for their specific fish tank. Precise dosing is critical for maintaining water chemistry and ensuring fish health.
How to Calculate Aquarium Doses (Formulas)
Always base your calculations on the actual water volume, taking substrate and decorations into account, not the advertised tank size.
- Dose Formula: (Tank Volume / Target Volume specified by manufacturer) * Recommended Dose Amount.
- Example: If a fertilizer requires 5ml per 10 gallons, a 30-gallon tank requires: (30 / 10) * 5ml = 15ml.
Frequently Asked Questions
How do I dose for an odd-sized tank?
If your tank is 23 gallons and the bottle says "5ml per 10 gallons," calculate the per-gallon dose (0.5ml per gallon) and multiply by 23, resulting in an 11.5ml dose. Use a plastic syringe for exact measurements.
Should I dose based on the empty tank volume?
No. A 55-gallon tank filled with thick gravel, driftwood, and rocks might only hold 45 gallons of actual water. When dosing sensitive medications (like Copper), overestimating water volume can lead to a lethal overdose. Always calculate the net water volume.
How often should I dose liquid fertilizers?
It depends on the lighting intensity, CO2 injection, and plant mass. High-tech planted tanks often require daily micro and macro-nutrient dosing (the Estimative Index method), while low-tech tanks may only need weekly dosing.