Aquarium keeping you can trust
Ichthyologist-reviewed guides, species profiles, and an interactive simulator to plan your tank without trial and error.
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Every piece is reviewed by an ichthyologist whose name and credentials are credited.
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We cite FishBase, Seriously Fish, peer-reviewed research and practitioner experience.
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No 'top 10 in one click'. Long-form guides with verifiable numbers and rationale.
Goldfish Care & Tank Size Mythbusting: Why Bowls Kill, Real Tank Sizes (50L+), and Long-Term Health
Why glass fishbowls are biological death traps, the actual 15–25 year lifespan of Carassius auratus, and why fancy varieties require a minimum 50–70L volume with heavy canister filtration.
Read the full guide
Popular species
Fish species →
Neon Tetra
BeginnerParacheirodon innesi
- Tank volume:
- from 60 L
- Maximum size:
- up to 4 cm
- Temperature:
- 20–26 °C
- pH:
- 5–7
Betta
BeginnerBetta splendens
- Tank volume:
- from 20 L
- Maximum size:
- up to 6.5 cm
- Temperature:
- 24–28 °C
- pH:
- 6.5–7.5
Guppy
BeginnerPoecilia reticulata
- Tank volume:
- from 40 L
- Maximum size:
- up to 5 cm
- Temperature:
- 22–28 °C
- pH:
- 7–8
Bronze Corydoras
BeginnerCorydoras aeneus
- Tank volume:
- from 80 L
- Maximum size:
- up to 7.5 cm
- Temperature:
- 22–28 °C
- pH:
- 6–7.5
Freshwater Angelfish
IntermediatePterophyllum scalare
- Tank volume:
- from 200 L
- Maximum size:
- up to 15 cm
- Temperature:
- 24–30 °C
- pH:
- 6–7.5
Discus
ExpertSymphysodon aequifasciatus
- Tank volume:
- from 250 L
- Maximum size:
- up to 17 cm
- Temperature:
- 28–30 °C
- pH:
- 5.5–7
Latest articles
Articles →
Deep-diveAquarium Algae Guide: Black Beard, Green Spot, Staghorn & Cyanobacteria — Complete Eradication Protocols
Stubborn black tufts on anubias, green dots welded to glass, or foul-smelling slime over substrate? Comprehensive algae identification, Redfield ratio tuning, localized H2O2 spot-dosing, and biological cleanup crews.
GuideJava fern (Microsorum pteropus): care, varieties and propagation
The most indestructible plant for a beginner aquarist. Grows without CO₂, without substrate, in any water. 5 common varieties, how to attach it and how to propagate it via plantlets.
Deep-diveCloudy Aquarium Water: Bacterial Blooms, Green Water & Suspended Debris — Causes & Complete Fixes
Milky-white cloudiness, emerald-green water, or floating micro-particles? A comprehensive guide to diagnosing water turbidity, emergency protocols, clarifier dosages, and UV-C sterilization.
Topics
Articles →
Guide20 gallon long aquarium setup: fish, plants, equipment — complete guide
The long 76 L aquarium is the gold standard for a second tank: more horizontal swimming space, fits 30–40 fish. Specific equipment list and three working stocking plans.
GuideGuppy (Poecilia reticulata): care, breeding and setup
The world's most popular beginner fish. Water parameters, sex ratio, feeding, runaway breeding and how to keep numbers under control.
GuideNerite snails: the algae-cleaner that won't breed in freshwater
A unique snail: eats green, brown and diatom algae faster than any competitor and biologically cannot breed in freshwater. The perfect janitor for a community tank.
GuideTop 15 beginner aquarium plants you can grow without CO₂
15 plants that thrive at moderate light, without CO₂ injection and without a nutrient substrate. Size, growth rate and planting zone for each. The ideal starter set for a 38–100 L tank.
GuideNeon tetra (Paracheirodon innesi): care, setup and breeding
The world's №1 schooling fish for beginners and one of the trickiest to breed. Water parameters, school size, tankmates, neon tetra disease, blackwater spawning.
Guide10 gallon aquarium setup under $150: a complete starter kit
A real equipment list with prices, step-by-step setup, stocking ideas. The most popular beginner tank size with a concrete budget.