🌱 For Planted Aquarium Hobbyists

Dose your tank
precisely, every day.

FertFlow calculates exactly how many grams of KNO3, KH2PO4, K2SO4, MgSO4, and CSM+B to add — based on your tank size and dosing method.

Download on the App Store See How It Works

Live Demo

Today's dose for a 29 gal EI tank

Thursday · Macro Day
EI High-Tech · 29 gal
EI Macro Day
KNO3
Potassium Nitrate
4.47g
0.74 tsp
KH2PO4
Monopotassium Phosphate
0.39g
0.07 tsp
K2SO4
Potassium Sulfate
2.43g
0.39 tsp

General dosing guidelines only — monitor your plants and water parameters.

Features

Everything your tank needs

📅

Today's Dose Schedule

EI alternates macro and micro days automatically. PPS-Pro doses daily. Always know what to add today.

⚗️

Precise Gram Calculator

Chemistry-based constants for each compound. Enter your tank volume — get exact grams and teaspoons instantly.

🪣

EI & PPS-Pro Methods

Supports EI High-Tech, EI Low-Tech (1/3 dose), and PPS-Pro. Switch methods anytime.

📊

Dose Log History

Track every dosing session. Streak counter keeps you consistent. Pro feature.

🔔

Dosing Reminders

Scheduled notifications aligned to your EI or PPS-Pro calendar. Never miss a dose. Pro feature.

🔒

Fully Offline

No account, no cloud, no internet required. All data stored locally on your device.

Supported Compounds

All the dry ferts you use

🧪 KNO3 — Potassium Nitrate 🧪 KH2PO4 — Monopotassium Phosphate 🧪 K2SO4 — Potassium Sulfate 🧪 MgSO4·7H2O — Epsom Salt 🧪 CSM+B — Trace Mix ⭐ Custom Compounds (Pro)

How It Works

Three steps to perfect dosing

1

Set up your tank

Enter your tank volume and choose EI or PPS-Pro dosing method

2

Check today's dose

FertFlow tells you which compounds to add and exactly how many grams

3

Mark as dosed

Log your session and build a consistent dosing streak for healthy plants

Stop guessing.
Start dosing precisely.

Free to use. Pro features $4.99/month.

Download on the App Store