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Aquarium planning, from the surface down
Build ahealthieraquarium.
Explore 65 reviewed inhabitants, compare real constraints and shape a stocking plan around your tank—not a one-size-fits-all rule.
Skip animation and exploreFind the right inhabitants
Meet the fish before you choose the fish.
Compare adult size, social need, water, behaviour and swimming zone. Every profile shows the animal first—and makes its assumptions visible.
Explore the photographic library
Likely match · high confidenceBetta splendensVisible traits + confidence + lookalikes
What is this fish?
From an unknown face to a careful shortlist.
Upload a clear photograph and add what you know. AquaDepth uses Claude Sonnet 5 vision to compare visible traits, explain uncertainty and connect a confident match to the care library.
01 Catalogue constrained02 Confidence labelled03 You confirm the match
Identify a fish from a photo
CentrepieceFreshwater angelfish
ShoalingNeon tetra
Compatibility snapshotPossible—with caution
Water overlapGood
Adult predationCaution
Short tankConflict
Transparent compatibility
See where two lives overlap—and where they do not.
AquaDepth checks water, adult size, group needs, territory and tank length. It explains uncertainty instead of hiding it behind a percentage.
Compare two inhabitantsBuild in layers
Watch a stocking idea become an ecosystem.
Add inhabitants to a visual tank, balance swimming zones and catch group, temperature, footprint and territory conflicts before checkout day.
Open the tank builderSurfaceMidwaterBottom
Volume100 L
Temperature25 °C
Starting fitStrong
One tank. Many connected lives.
Every stocking choice changes the whole picture.
Start with the animal, understand the constraint, then build the environment around it.
Tools below the surface
Useful maths, made visible.
Calculate water volume, heater capacity, filter flow, substrate, filled weight and water changes with formulas you can inspect.
0163.0L
See all 11 toolsAquarium volume calculator
Estimate internal water volume from rectangular dimensions.
02126kgBow-front volume calculator
Estimate a bow-front tank using a transparent geometric approximation.
03100WAquarium total-weight calculator
Plan floor and stand load from water, glass, substrate and hardscape.
04378L/hHeater-size estimator
Estimate heater power from volume and the room-to-water temperature rise.
0518kgFilter flow and turnover calculator
Compare actual estimated flow with a chosen hourly turnover target.
0615.8LSubstrate quantity calculator
Estimate substrate volume and mass from footprint and depth.
Return to clarity
Research that connects back to your tank.
153+ crawlable pages form one focused aquarium knowledge system—reviewed, dated and internally linked.
Popular profiles
Betta fishBetta splendensFreshwater angelfishPterophyllum scalareGuppyPoecilia reticulataEndler's livebearerPoecilia wingeiAll profiles →Compatibility guides
Betta tank matesReviewed pairing guidanceAngelfish tank matesReviewed pairing guidancePea Puffer tank matesReviewed pairing guidanceGoldfish tank matesReviewed pairing guidanceAll tank-mate guides →Start with a tank
5 gallon stocking ideas3 complete concepts10 gallon stocking ideas3 complete concepts15 gallon stocking ideas3 complete concepts20 gallon stocking ideas3 complete conceptsAll tank sizes →65inhabitant profiles
35tank-mate guides
15foundational guides
3+sources per profile
Read our methodology →