Aquarium management
for serious keepers

Track tanks, livestock, parameters, and routines in one place—built for people who manage more than just a tank.

Free to use. No credit card required.

Complexity grows with your setup

More tanks, more livestock, more variables, more mental overhead. Notes get scattered across apps. Memory fills the gaps—until it doesn't. Important context slips away between water changes, feedings, and breeding cycles. What worked yesterday becomes hard to remember next month.

What Lamnr does

Organization and continuity for aquarium keepers—not automation or gimmicks.

Manage multiple aquariums

Each tank has its own livestock, notes, parameters, and maintenance history. Group tanks into systems when they share filtration or context.

Track livestock with context

Log fish individually or in groups. Add breeding status, lineage, health notes, and photos. Keep history as animals move between tanks.

Log parameters over time

Record water parameters and measurements to build continuity and reference—not raw data for its own sake, but context for better decisions.

Record and share routines

Track feedings, maintenance, and dosing schedules. Share access with family members, staff, or pet sitters when someone else needs to help.

See it in action

A clean interface that works on any device—at home, in the fish room, or on the go.

Dashboard Overview

Lamnr dashboard showing tank vitals, tasks, and livestock overview

Your complete aquarium overview at a glance

Livestock Tracking

Track every fish, coral, and invertebrate

Petsitter View

Petsitter care dashboard for shared tank access

Petsitter Mode

Share simple care instructions with anyone

Maintenance Logs

Never miss a water change or feeding

Why not a spreadsheet or notes app?

General tools can store information, but they don't understand aquariums. Lamnr is built around how fish keeping actually works: tanks, livestock, routines, and outcomes are connected by design.

Scales naturally from a few tanks to a full breeding rack

Stays readable even when shared with others

Built by keepers who understand the domain

Who Lamnr is for

Growing hobbyists

Keepers who want clarity as their setups expand beyond what memory can reliably track.

Breeders

Those who need continuity and lineage tracking without the overhead of complex systems.

Stores & multi-tank operators

Teams that need shared visibility across many tanks without confusion.

Anyone with a pet sitter

If someone else occasionally cares for your aquariums, Lamnr makes handoffs simple.

Free to use, and straight about your data

Lamnr is free. We collect your email and the aquarium information you log, and we're clear about what happens with it. Creating an account means accepting these terms.

Email

We may contact you about the product, updates, and mailing list news. Marketing emails are on by default and can be turned off any time in Settings.

Aquarium data

Tank and fish information is charted to build recommendations and study how species are kept. Anything shared publicly is anonymized first, to help the fishkeeping community.

Never sold

Your data is never sold and never given to another party. No hidden buyers, no third-party handoffs.

Read the full privacy & data use terms

Built deliberately, with input from serious keepers

Lamnr is being developed thoughtfully, guided by real hobbyists and breeders. It's free to use, and it stays that way.

Free to use. No credit card required.