Aquarium planning suite
21Profiled species
12Interactive tools
6Deep keeper guides
7Shrimp specialist profiles
Plan healthy, compatible aquariums with confidence.
Research fish, shrimp, and invertebrates. Run pair-by-pair compatibility checks. Use proven calculators for equipment and water chemistry. Keep your systems organised in one clear workspace.
How it helps
Everything needed to plan and run a stable aquarium
Fishz Atlas answers the questions that matter most: which livestock combinations are truly compatible, whether your setup is correctly sized, and what maintenance routine keeps your tank stable over time.
Research
Review tank size, water chemistry, temperament, and care guidance before adding new livestock.
Plan
Use calculators for filtration, heating, acclimation, substrate, cycle planning, and water-change accuracy.
Manage
Track aquariums, save species lists, and log maintenance so every tank stays on plan.
Featured species
Browse all species
Profiles built for planning, not trivia
CHARACIN
Neon Tetra
A classic shoaling tetra that looks best in dark, planted layouts with gentle flow and stable water.
FishBeginnerPeaceful schooling fish
- Tank
- 60 L+
- Temp
- 22-26 C
- pH
- 6.0-7.2
- School
- 10+
CHARACIN
Cardinal Tetra
A more heat-loving and demanding Amazon tetra with saturated colour and a strong preference for soft water.
FishIntermediatePeaceful schooling fish
- Tank
- 90 L+
- Temp
- 24-28 C
- pH
- 4.8-6.8
- School
- 12+
CYPRINID
Harlequin Rasbora
A dependable Southeast Asian shoaler that suits planted community aquariums and mixed nano displays.
FishBeginnerCalm schooling fish
- Tank
- 70 L+
- Temp
- 23-27 C
- pH
- 6.0-7.5
- School
- 8+
CYPRINID
Celestial Pearl Danio
A jewel-like microfish for dense aquascapes, cooler tropical setups, and calm companion species.
FishIntermediatePeaceful but shy
- Tank
- 45 L+
- Temp
- 20-25 C
- pH
- 6.5-7.5
- School
- 12+
ANABANTOID
Honey Gourami
One of the best peaceful centerpiece fish for planted tropical communities and softer water setups.
FishBeginnerPeaceful centerpiece
- Tank
- 60 L+
- Temp
- 24-28 C
- pH
- 6.0-7.5
- School
- 1+
CICHLID
German Blue Ram
A spectacular but demanding warm-water dwarf cichlid that rewards meticulous husbandry and stability.
FishAdvancedMostly peaceful dwarf cichlid
- Tank
- 90 L+
- Temp
- 27-30 C
- pH
- 5.5-7.0
- School
- 2+
Tools suite
Open all calculators
Calculators for the parts that usually go wrong
Tank Volume Calculator
Convert aquarium dimensions into gross and working water volume in litres and US gallons.
Stocking Planner
Estimate safe bioload using aquarium volume, filtration, maintenance cadence, and fish size.
Heater Sizing Calculator
Match heater wattage to tank size, room temperature, and target tropical range.
Filtration Turnover Calculator
Check whether your filter flow is appropriate for planted, community, riverine, or shrimp systems.
Water Change Planner
Calculate replacement volume, refill temperature blend, and conditioner dose for every change.
Dechlorinator Dose Calculator
Dose conditioner accurately for full tanks, top-ups, or emergency chloramine events.
Drip Acclimation Planner
Plan acclimation time and drip rate for shrimp, wild fish, and sensitive species.
Substrate Volume Calculator
Estimate how many litres or kilograms of substrate you need for a target bed depth.
Aquarium Salt Calculator
Work out grams and teaspoons needed for tonic, dip, or treatment-level salt concentration.
Cycle Timeline Planner
Estimate cycle length and ammonia dosing checkpoints for fishless starts.
Lighting Load Estimator
Gauge lighting intensity for low-tech, medium, and high-energy planted systems.
Parameter Converter
Convert Celsius to Fahrenheit, ppm to dGH or dKH, and conductance into practical care values.
Guides
See all guides
Clear, practical guides for better results
All keepers
Read guide
Fishless Cycling Masterclass
Build biological filtration without exposing livestock to ammonia or nitrite.
Beginner to intermediate shrimp keepers
Read guide
Shrimp Keeping 101
The stability-first framework for building shrimp colonies that survive, moult, and breed.
All keepers
Read guide
Water Chemistry Explained for Keepers
Understand pH, GH, KH, TDS, ammonia, and nitrate in practical keeper language.
FAQ
Common keeper questions, answered directly
What makes Fishz Atlas different from a typical aquarium blog?
Fishz Atlas combines structured species data, practical calculators, compatibility planning, and a keeper dashboard. It is built to help people run better aquariums, not just read articles.
Can I use the site for both fish-first and shrimp-first aquariums?
Yes. The content and tools are designed around both tropical fish and freshwater shrimp, including mixed-community edge cases where predation, minerals, and temperature requirements overlap.
Is the compatibility guidance absolute?
No compatibility score can replace observation, tank size, and individual behaviour. Fishz Atlas uses water chemistry, adult size, temperament, and predation risk to give planning guidance that should still be validated against your actual setup.