Fertilizer Calculator
The Wet Leaf · Nature Aquarium Systems
Choose a fertilizer, see its recommended schedule, and calculate the nutrients each dose adds to your aquarium.
Calculate my doseChelated iron and chelated micros contain elements such as Fe, Mn, Zn and Cu. EDTA, DTPA and EDDHA are chelating agents—not additional elements. Some products also declare Cl, Ni, Co or other trace elements.
Your water
Enter the water volume you actually treat.
Your routine
Use the manufacturer’s schedule or choose a dry-dosing method.
Your nutrients
See the addition from each dose and the weekly total.
Aquarium fertilizer calculator
03 / Your results
Choose a routine you can maintain
Manufacturer dosing
The recommended dose and schedule come from each product’s directions. If a label gives a range, choose an option within that range. “As needed” does not imply a fixed weekly count.
Dry nutrient methods
EI, EI daily, EI light / weekly, PPS-Pro and PMDD are separate from bottle instructions. Preset additions are editable. A single compound calculation is not a complete balanced fertilizer recipe.
Know what ppm means
ppm is mg/L. Per-dose additions are before plant uptake, water changes, precipitation or adsorption. Weekly additions describe your dosing routine, not a predicted water-test result.
Why are some ppm values unavailable?
Some manufacturers publish percentages by weight without a verified liquid density. That is not enough to calculate nutrient mass per mL. Where supported, weigh the actual liquid dose in Advanced mode. Unknown or undeclared nutrients show a dash, not zero. Match your bottle’s label and region; historical and current formulas may differ.
When will NAS products be added?
NAS V3 with copper, NAS chelated iron and NAS dry micronutrient mixes remain coming soon until exact analyses and product links are confirmed. The dry references let you explore chemistry and methods without claiming an unverified NAS formulation or product range.
Fertilizer library & sources
Store links are included only for confirmed Wet Leaf products. Dry entries link to Canadian supplier listings; listing does not guarantee current stock, shipping or aquarium suitability. Products with incomplete or conflicting analyses cannot calculate ppm. Checked October 18, 2026.