The Green Journal

Expert Species Spotlight Fish Care Guides

By The Aquarium Calculators Editorial Team

Explore our collection of species spotlight fish care guides and practical articles.

Betta Fish Care 101 — Why the Siamese Fighting Fish is Still King on Instagram featured article

Species Spotlight

Betta Fish Care 101 — Why the Siamese Fighting Fish is Still King on Instagram

With over 10 million posts under #bettafish, the Siamese fighting fish remains the most photographed aquarium pet. Here’s how to care for one properly.

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Latest Fish Care Guides

Crawlable, practical articles linked to calculators and fish entities.

Three different types of corydoras catfish on sand substrate
Article · 5 min

Corydoras Showdown: Julii vs. Sterbai vs. Panda – Which is Best for Your Tank?

Highfin Glassy Perchlet, a semi‑transparent native Indian fish
Article · 5 min

Top 10 Native Indian Ornamental Fish for Your Aquarium

School of neon tetras swimming in a planted tank
Article · 5 min

Neon Tetras vs. Other Tetras — Which School is Right for Your Tank?

Knowledge Journey

Take Action After Reading

Turn article insights into decisions with calculators, fish pages, and a quick personalized quiz flow.

Calculator

"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.