The Green Journal
Fish Care Articles, Troubleshooting, and Seasonal Guides
By The Aquarium Calculators Editorial Team
Read practical fish care notes for repotting, pests, humidity, watering, fertilizer, sunlight, and beginner-friendly routines. Use header search for all 52 journal entries.
Latest Fish Care Guides
Crawlable, practical articles linked to calculators and fish entities.
12 articles on this page
Best Beginner Fish for Indian Aquariums (That Actually Survive)
The Ultimate Algae Eater Face‑Off: Otocinclus vs. Nerite vs. SAE
Aquarium Podcasts and YouTube Channels You Should Follow in 2026
Betta Fish Care 101 — Why the Siamese Fighting Fish is Still King on Instagram
Betta Fish Myths Busted: What You Need to Know Before Bringing One Home
Betta Sorority Tank: The Ultimate Guide to Female Betta Communities
Biotope Aquariums: How to Create an Authentic Ecosystem
Blackwater Biotope: How to Create a Natural Tannin Aquarium for Healthier Fish
How Aquarium Hobbyists Are Saving Endangered Fish from Extinction
Catch-and-Release Fishing — Why It’s Going Viral for the Right Reasons
Cloudy Aquarium Water: 7 Causes & Fast Fixes
CO2 Injection for Planted Aquariums
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"Why Is My Fish Dying?" Diagnostic Tool
Don't panic — most fish illnesses are treatable if caught early. Select the exact symptoms your fish is showing and our diagnostic engine will identify the most likely cause, whether it's Ich, Dropsy, ammonia poisoning, or a parasite — and walk you through exactly what to do right now to save them.
Calculator
Ammonia Toxicity Calculator (Free NH3)
Enter your test kit reading (TAN), pH, and temperature — get an instant SAFE or LETHAL verdict for Free Ammonia (NH3). Built for API Master Kit users, cichlid tanks, reef setups, and fish breeders.
Calculator
Annual Fish Keeping Cost Calculator
Estimate the true annual cost of your aquarium by entering tank volume, heater wattage, filter and light power, heater runtime, and local electricity rate. Get a practical itemized breakdown for heating, filtration, lighting, water, and routine consumables before you set up, upgrade, or troubleshoot a tank.
Fish Guide
African Butterflyfish
Complete African Butterflyfish (Pantodon buchholzi) care guide. Learn optimal tank size (30-40+ gal), water parameters (pH 6.0-7.5, 75-86°F), surface feeding, breeding simulation, and compatible tank mates.
Fish Guide
African Cichlid
Complete African Cichlid (Mbuna/Peacock/Haplochromis) care guide. Learn optimal tank size (55-75+ gal), water parameters (pH 7.8-8.6, 75-82°F), Rift Lake setup, diet, and species compatibility.
Fish Guide
African Leaf Fish
Complete African Leaf Fish (Ctenopoma acutirostre / Leopard Bushfish) care guide. Learn optimal tank size (40-55+ gal), water parameters (pH 6.5-7.5, 75-82°F), carnivorous diet, and compatible tank mates.