Aquarium keeping you can trust
Ichthyologist-reviewed guides, species profiles, and an interactive simulator to plan your tank without trial and error.
Why you can trust us
Experts on the team
Every piece is reviewed by an ichthyologist whose name and credentials are credited.
Real sources
We cite FishBase, Seriously Fish, peer-reviewed research and practitioner experience.
No clickbait
No 'top 10 in one click'. Long-form guides with verifiable numbers and rationale.
Hospital tank: setup and use
When you can't dose the main tank with meds, you need a separate one. How to set it up, keep it ready, and not kill the patient.
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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 →
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.
Topics
Articles →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.
GuideCherry shrimp (Neocaridina davidi): care and breeding for beginners
The easiest aquarium shrimp for beginners: parameters, food, breeding, colour grades, common mistakes. Real numbers for keeping a colony from 10 individuals to hundreds.
GuideBetta fish care: a complete beginner's guide (Betta splendens)
Tank size, temperature, filtration, diet, tankmates, common diseases, breeding — everything you need to know about bettas before buying one. Real numbers, no 'lives in a cup' myths.
Deep-diveFilters and aeration for aquariums of every size — the complete guide
How to size a filter to your tank, calculate turnover, pick the right type, and decide if you need extra aeration. From nano cubes to large biotopes.
Deep-diveAquarium fish diseases — diagnostic algorithm and 8 key conditions
How to spot illness by behaviour and look, a four-step diagnostic protocol and treatment outlines for the 8 most common diagnoses: ich, velvet, columnaris, dropsy, swim bladder, saprolegnia, internal parasites, gill flukes.