Your aquarium’s memory.

Design your tank in 3D, then keep a calm record of every change — so when something shifts, you’ll know exactly why.

Request early access See how it works
  • Design in 3DRimless tank, your scape
  • Local-firstYour files, your machine
  • SnapshotsBefore / after, exported

Features

Everything your tank remembers.

  • Design in 3D

    Sketch a rimless tank, place your hardscape, and see the scape before a single rock gets wet.

  • Care log

    Water changes, dosing, trims, livestock — every event lands on one tank-wide timeline in seconds.

  • Track parameters

    pH, KH, GH, NO₃ — the numbers that matter, charted next to the changes that moved them.

  • Snapshots

    Side-by-side photos at any cadence you like — exportable, shareable, undeniable progress.

  • Reminders

    Filter swaps, dosing intervals, water changes — quiet nudges, never noisy.

  • Local-first

    Your tank, your machine, your files. Sync if you want it; works fine if you don’t.

Keep the record

Every change, on the record.

Log water changes, dosing, trims, new livestock, and gear swaps in seconds. Your tank’s whole history stays one scroll away — no spreadsheet, no memory required.

Dorsal's care log — water changes, dosing, trims, and livestock on one tank-wide timeline, charted next to parameters

Find the cause

Stop guessing what went wrong.

See every change on one timeline, so cause and effect line up. When algae shows up or a plant starts to melt, trace it back — instead of dosing blindly and hoping.

Dorsal's diagnostics — a parameter charted over time with its safe band shaded, the reading trending toward the edge

See the progress

Watch your tank grow in.

Capture before-and-after snapshots and export them. Months of slow progress, visible at a glance — and easy to share with everyone who said it couldn’t be done.

Dorsal snapshots — before-and-after captures of the same scape growing in over several months

FAQ

Questions, answered.

  • What is Dorsal?

    Dorsal is a local-first aquarium care log and 3D tank designer for freshwater and saltwater keepers. You design your tank in 3D, then log water changes, parameters, livestock, and snapshots on one tank-wide timeline — so you always know why your tank changed.

  • What can I track in Dorsal?

    Water changes, dosing, plant trims, new livestock and plants, and equipment swaps — plus parameters like pH, KH, GH, and nitrate. Every event and reading lands on one timeline, charted next to the changes that moved it.

  • Is my data private, and does Dorsal work offline?

    Yes. Dorsal is local-first: your tank data lives in files on your own machine and works without an internet connection. Optional sync is there if you want it, and works fine if you don’t.

  • What platforms does Dorsal run on?

    Dorsal is a desktop app for macOS and Windows, with an iOS companion app in development for logging from your phone.

  • How is Dorsal different from a spreadsheet?

    A spreadsheet stores numbers; Dorsal connects them. Every change and every reading sits on one timeline, so cause and effect line up. When algae appears or a plant melts, you can trace it back instead of dosing blindly and hoping.

  • How do I get access?

    Dorsal is in early access. Join the waitlist below and we’ll bring you in — we’re onboarding new keepers each week.

Early access

Start with a tank that remembers.

Be among the first to design, track, and stop guessing. We’re onboarding new keepers each week — drop a line and we’ll bring you in.

Request early access

Two quick questions, then your email. Takes about 20 seconds.