Roshan Aquva World
SUBMERGING INTO ATLAS
Diving through species care sheets & parameters…
ROSHAN AQUVA WORLDTHE AQUARIUM ATLAS
Know your fish. Understand your aquarium.
Practical aquarium knowledge for choosing fish, understanding their needs, planning tanks and caring for aquatic life.
120+Species Profiles
100%Free & Open Atlas
6+Smart Tools
Amazonian Biotope
28°–30°C
THE NATURAL HABITATpH 6.0 - 7.0
Symphysodon aequifasciatus — Planted Amazonian Biotopes
Soft Water (1–5 dGH)•Planted Setup
Blue Diamond DiscusFeatured Profile
THE AQUARIUM LIBRARY
Explore the underwater world.
Species Catalog
FISH LIBRARY
Discover freshwater and saltwater species with detailed care parameters, temperaments, and minimum tank dimensions.
Explore Archive
Botanical Index
AQUARIUM FLORA
Explore hardy low-tech and high-light aquatic flora to naturally absorb nitrates and oxygenate water.
Explore Archive
Equipment Guide
HARDWARE DIRECTORY
Understand filtration mechanics, precision heating thermostats, and full-spectrum LED lighting.
Explore Archive
Knowledge Base
CARE GUIDES
In-depth reference articles on biological cycling, acclimation protocols, and long-term water stability.
Explore Archive
SPECIES FIELD GUIDE
View Species LibraryFind the right species.
Care requirements, adult sizing, and compatibility guidelines from our species library.
Freshwater
Neon Tetra
Paracheirodon innesi
Min Tank10 Gal
Care LevelBeginner
A small, peaceful schooling tetra from the Amazon basin, known for its blue iridescent stripe and red lower body. Keep a group of at least 6, with 8-10 or more often providing more natural schooling behavior.
Open Species Sheet
Freshwater
Guppy
Poecilia reticulata
Min Tank10 Gal
Care LevelBeginner
A colorful, active livebearer that is adaptable and beginner-friendly. Guppies reproduce readily, so mixed-sex groups can quickly increase the aquarium's population.
Open Species Sheet
Freshwater
Betta Fish
Betta splendens
Min Tank5 Gal
Care LevelBeginner
A tropical freshwater labyrinth fish known for its flowing fins and territorial behavior. Individual temperament varies, and male Bettas should not be housed together.
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Freshwater
Corydoras Catfish
Corydoras spp.
Min Tank20 Gal
Care LevelBeginner
Peaceful, bottom-oriented catfish that use their barbels to search the substrate for food. Corydoras are social and generally do best in groups of their own species, with 6 or more being a useful target for many commonly kept species.
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Freshwater
Angelfish
Pterophyllum scalare
Min Tank55 Gal
Care LevelIntermediate
A tall-bodied South American cichlid that can be peaceful when young but may become territorial as it matures, especially when pairing and spawning. Adult size and body shape make tank height and footprint important.
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Freshwater
Oscar
Astronotus ocellatus
Min Tank75 Gal
Care LevelAdvanced
A large, intelligent South American cichlid that can become territorial and predatory. Oscars grow quickly, produce substantial waste, and may eat fish small enough to fit in their mouths.
Open Species Sheet
CORE PRINCIPLES
Good aquariums begin with good information.
Every successful aquarium relies on five foundational pillars of aquatic ecology.
01
The Invisible FoundationWater Chemistry
An established aquarium is a closed biological ecosystem. Beneficial nitrifying bacteria convert toxic ammonia and nitrite into manageable nitrate. Stability is vastly more important than chasing textbook pH numbers.
Read Knowledge Article
02
Swimming FootprintsSpace & Volume
Water volume determines biological buffer capacity against waste spikes, while tank length provides the swimming distance required by active schooling fish. Vertical height matters less than surface footprint.
Read Knowledge Article
03
Social & Biotope DynamicsCompatibility
Fish compatibility depends on temperament, adult size ratios, feeding competition, and habitat chemistry. Never mix predatory species with fish that can fit in their mouth.
Read Knowledge Article
04
Species-Specific FeedingDiet & Nutrition
Overfeeding is the number one cause of water parameter crashes in new aquariums. Provide high-quality variety (pellets, live/frozen, greens) in amounts consumed within two minutes.
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05
Sustainable HabitatsRoutine Maintenance
Consistent 20-25% partial weekly water changes remove accumulated nitrates and replenish vital trace minerals. Regular maintenance preserves long-term biological equilibrium.
Read Knowledge Article
PRACTICAL UTILITIES
Plan before you stock.
Practical tools and calculators to help you plan and manage your aquarium.
Species Compatibility Matrix
Verify temperature, pH, adult sizes, and social temperaments before introducing new tankmates.
Launch Tool
Tank Size & Volume Guide
Explore footprint dimensions, filled weights, and realistic stocking capacities from 5 to 75+ gallons.
Launch Tool
Aquarium Flora Matcher
Find live aquatic flora matched to your lighting levels, substrate, and maintenance commitment.
Launch Tool
Equipment Recommender
Get tailored hardware recommendations for filtration flow rates, heaters, and LED lighting.
Launch Tool
Water Chemistry Analyzer
Learn practical management of ammonia, nitrite, nitrate, pH, and water hardness.
Launch Tool
Maintenance Schedule
Daily, weekly, and monthly checklists to maintain biological equilibrium without panic.
Launch Tool
BEGINNER ROADMAP
Starting your first aquarium?
Follow this 5-step biological progression to establish a resilient, thriving habitat.
01
Read Step DetailsChoose the Tank & Footprint
Select an appropriate volume (20-gallon long is ideal for beginners) and a sturdy, level stand capable of supporting filled water weight (~10 lbs per gallon).
02
Read Step DetailsPrepare the Aquatic Environment
Install the filter, heater, and substrate. Dechlorinate tap water before filling to protect future bacteria colonies from chlorine and chloramine.
03
Read Step DetailsBiological Nitrogen Cycle
Establish the biological nitrogen cycle over 3–6 weeks using liquid ammonia or fishless cycling. Verify ammonia and nitrite are strictly 0 ppm.
04
Read Step DetailsStock Resilient Initial Species
Start with a small group of hardy, peaceful community species. Acclimate slowly via float-and-drip methods to equalize temperature and pH.
05
Read Step DetailsMaintain Consistent Parameters
Perform 20–25% partial weekly water changes, vacuum detritus from substrate, feed in moderation, and test parameters weekly with liquid test kits.
THE AQUARIUM KNOWLEDGE LIBRARY
Build a better aquarium, one decision at a time.
Explore species profiles, water chemistry parameters, and practical equipment setup guides in our growing library.