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Coral tools and calculators

18 free calculators, planners and checkers made for corals, grouped by topic. Each one uses coral reference data for growth, diet, housing and health, so the results fit your animal rather than a generic pet.

Fish & Aquatics18 tools10 topics

Coral care tools and calculators

This page brings together every XpertsPet tool for corals: 18 in all, across 10 topics including age, behavior, breeding, cost, environment and health. Pick a topic above to see its tools, or read on for a quick guide to what each group does and where to start.

Corals at a glance

A healthy coral usually lives 10 to 50 years, so the care decisions you make now play out over a long time. Corals are filter feeders, which shapes what you feed and how much. They reach maturity at about 3 years old.

Corals are colonial animals, not plants, and depend on stable salinity, alkalinity, calcium and strong lighting. They are the least forgiving part of a reef tank, where stability matters more than any single value.

The health problems vets see most often in corals include bleaching from heat or light stress, tissue recession from unstable alkalinity, brown jelly infection and pests such as flatworms and aiptasia.

Coral quick facts

Reference values for corals from the species data behind this tool.
MeasureCoral
Typical lifespan10–50 years
DietFilter feeder
Mature atAbout 3 years
Clutch size0–0 eggs

Where to start

  • Thinking about getting a coral? Start with the cost tools to see what you are signing up for.
  • Setting up a home? The housing calculators size the space and work out how much bedding or substrate you need.
  • Unsure about feeding? The nutrition tools give a daily amount you can adjust as you go.
  • Raising a young coral? Use the weight and growth tools to check it is on track.
  • Caring for an older coral? The age tools show its life stage and what usually changes next.

Other fish & aquatics

If you keep more than one kind of animal, there are tools for goldfish, betta fish, guppy and molly. You can also browse every pet on XpertsPet.

Frequently asked questions

What tools are there for corals?

There are 18 coral tools across 10 topics, including age, behavior, breeding, cost and environment. Each topic has its own page listing every tool in it.

Are the coral calculators free?

Yes. Every tool is free, needs no account and runs in your browser. Nothing you enter is stored on our servers.

How long do corals live?

Typically 10 to 50 years with good care, though genetics, diet and housing all play a part. The coral age tools estimate life stage and lifespan for your own animal.

How do I know how much to feed my coral?

Start with the coral nutrition calculators, which give a daily amount based on weight and age, then adjust it by watching body condition over a few weeks.

How accurate are the coral results?

They are well-sourced estimates based on reference data for corals, and each tool lists its sources. Individual animals vary, so confirm anything health-related with your vet.