Freshwater aquarium planner

Plan a community tank that actually works.

Match fish, shrimp, and snails by water, behavior, bioload, and real-world aquarium context.

Betta tank mates Betta + Corydoras Aquarium photo examples

Visual aquarium planning

See your whole aquarium before adding fish.

Choose actual group sizes, explore recorded swimming zones, and inspect water overlap and current rule warnings. The illustration is not proof of safe cohabitation.

Explore the planner How the visuals work

Use the planner to see actual group counts, shared water ranges, and the reasons behind each compatibility flag.

Community blueprint

A lively illustration · approximate swimming zones

3 species · 15 individual animals pictured

Neon Tetra × 8middle water · illustration
Panda Corydoras × 6bottom water · illustration
Honey Gourami × 1top water · illustration

Fish colors, shape, position and swimming are artistic approximations, not a photograph, scale model or proof of compatibility. See the separate adult-size ruler and safety findings.

Illustrative zones only · not a stocking recommendation

TankMatcher tools

Choose the aquarium tool you need.

Use the same core planning tools from the top navigation: compatibility checks, stocking, water parameters, photos, cleanup crew, setup planning, and aquarium weight.

Visual Aquarium PlannerPlan a whole community, compare group sizes and water overlap, and inspect explainable compatibility warnings.Fish Compatibility CheckerCheck whether selected fish, shrimp, and snails overlap on behavior, size, water, and stocking needs.Aquarium Stocking CalculatorPlan by gallons, group size, adult size, and bioload before adding more animals to a tank.Aquarium Photo ExamplesBrowse real community tank photos, Betta tank mate examples, shrimp, snails, and observed context.Water Parameter MatcherCompare freshwater species by temperature, pH, GH, KH, and water preference overlap.Algae Eater FinderFind cleanup crew options by algae type, tank size, temperament, and freshwater compatibility.Fertilizer CalculatorEstimate planted tank dosing for common fertilizers without turning the page into a chemistry maze.Tank Setup GeneratorGet setup ideas for freshwater tanks, aquascapes, cleanup crews, and community stocking plans.Aquarium Weight CalculatorEstimate filled aquarium weight from gallons, glass, substrate, hardscape, and equipment.AqAdvisor AlternativeCompare TankMatcher's compatibility and stocking approach with older aquarium calculator workflows.Species GuidesOpen species pages, Betta tank mate guidance, care ranges, and real-world context when available.Aquarium ArticlesRead practical freshwater guides on tank mates, stocking limits, water parameters, and setup risks.

Popular tank mates

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Betta Neon Tetra Guppy Bristlenose Pleco Compatibility checker Stocking calculator

By tank size

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Aquarium articles

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Black skirt tetras in a planted freshwater community aquarium, illustrating community stocking choices for a 40-gallon tank

Best fish for a 40-gallon tank

A 40-gallon aquarium is the size where freshwater stocking choices open up considerably. You have enough horizontal length and water volume to keep a...

Blue Betta fish in a freshwater aquarium illustrating solo stocking options for a five-gallon tank

Best stocking ideas for a 5-gallon tank

A 5-gallon tank is one of the most popular starter sizes, but it sits right at the edge of what most fish can tolerate long-term. The math is...

Female betta swimming with smaller community fish in a planted aquarium - a conditional pairing that needs dense cover and a ready backup plan

Can betta and guppy live together?

Short answer: sometimes, but only with caution. A betta and guppies can share a tank under specific conditions, but this pairing carries real risk: long fins and bright color can trigger betta aggression or fin nipping, and outcomes vary heavily by individual fish. Treat it as a yellow-light decision with a ready backup plan, not a safe default.