Princess Magenta — a pink fish above, holographic glass legs below, judging your aquascape with love

AQUAREALM

Plan your aquarium at true size, stock it safely, and get judged with love by a reverse mermaid.
A soft place for fishkeepers. 🫧

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no ads · no tracking · everything stays on your device

What it does

true to size

A 12″ oscar really is that big

Fish render at real adult scale — 25.4 pixels per inch — inside real tank footprints from a 5-gallon to a 75. Watching one fish fill a third of your tank teaches more than any warning label.

compatibility engine

98 species, real rules

Predation by size, fin-nippers vs. long fins, schooling minimums, temperature and pH overlap, snail- and shrimp-safety, stocking limits per tank. When it's wrong, Magenta names names.

power outage mode

Plants as life support

Walstad-style math turns your plant load into days of filterless safety — with a shopping list of exactly how many bunches keep your fish breathing.

the water lab

Chemistry in plain English

Ammonia, nitrite, nitrate, pH, GH, KH and CO2 — each named, explained, and judged. pH is scored on stability, not a magic number, because swings are what kill tanks.

feeding & personality

Frozen cubes, real consequences

Guess your tank's appetite. Overfeed and the water clouds. Underfeed and the babies go frantic. Your tank's personality — Zen Church Picnic to Absurdist Fight Club — decides how Magenta reacts.

the dex & the hunt

Photograph your real fish

Snap your own fish, shrimp or plants side-on, crop them, and they swim in your virtual tank — so you can plan a real aquascape with your real livestock before you move a single rock. Your photos never leave your phone.

verdict cards

Shareable judgment

Every layout gets a score and one of Magenta's lines, stamped on a card built for posting. Pride cards and roast cards alike.

Her, in her own words

"That Oscar will eat your little Neon Tetra like Sunday dinner, and he won't even say grace!"— on predation
"A snail without a strong shell is just a sad little handshake. Sweeten that water."— on acidic tanks
"Every tank is a work in progress, and Magenta judges layouts — never people."— Reef Rule №1

Pricing

One price — paid once, yours forever

  • 98 species — fish, shrimp & snails, all of them
  • 50 live plants, 21 real tank footprints
  • Photograph your own fish and drop them in your tank
  • The full water lab, breeding checker & every guide
  • Unlimited tanks in the Fish Room
  • All 21 of Magenta's outfits — 17 from the first launch, 4 you earn by caring for your fish
  • No subscription. No in-app purchases. No ads. No tracking.

One price. Everything included. That's the whole deal, sugar.

The Reef Rule

Fishkeeping forums can be brutal to beginners. Aquarealm teaches the same hard facts — gape limits, pH crashes, why your betta needs to live alone — but gently, from a grandma who's on your side. It's a place to learn, celebrate, and love some fish.