Reef keeping, without the guesswork
Corals don't fail overnight—they fail while something small goes unnoticed. Meta Reef keeps your parameters, maintenance, livestock, photos, and spending in one free tank management app, so nothing slips and every coral gets its best shot.
Everything your reef needs, in one place
Connected tools that turn scattered notes and test strips into a clear picture of your tank's health. Tap any feature to see how it works.
Parameter Tracking
Log all 10 key reef parameters and watch trends over time with clear charts. Custom target ranges flag anything drifting out of spec before corals notice.
Maintenance & Water Changes
Log water changes, dosing, filter cleanings, and equipment upkeep. Your water-change status updates automatically from your own cadence—no more guessing when you last did one.
Reminders & Schedule
Smart, per-tank reminders for tests, water changes, and dosing. Set a cadence and a grace window; dismiss a single occurrence with one tap—undo included.
Livestock Inventory
Catalog every coral, fish, and invert across all your tanks. Track placement, source, and photos, and keep a living record of your reef as it grows.
Photo Journal
Build a dated timeline of your reef. Attach photos to notes, corals, and maintenance, caption them, and set a cover shot to watch your tank transform month over month.
Spending & Reef Value
See what the hobby really costs, by category and across every tank—and what your corals are worth right now, priced from live marketplace listings.
Why reef keepers track their tanks
A reef is a slow-moving system where small drifts become big problems weeks later. Consistent logging is the single habit that separates thriving tanks from crashes.
Catch problems early
Target ranges turn raw test numbers into plain good / watch / out-of-range signals, so a drifting parameter gets your attention before it stresses livestock.
Understand your trends
A single reading tells you little. A month of readings tells you whether your alkalinity is stable, climbing, or crashing—and charts make it obvious at a glance.
Everything in one place
Parameters, maintenance, livestock, photos, and spending live together per tank. No spreadsheets, no scattered notes, no whiteboard on the stand.
Works everywhere, free
Log a test from your phone at the tank, review trends on a laptop later. It runs in any browser, syncs instantly, and costs nothing.
Up and running in three steps
No setup fee, no hardware, no learning curve. Your first tank takes minutes.
Add your tank
Name it, set the volume and type, and pick a setup date. Meta Reef suggests sensible target ranges for your tank type automatically.
Log as you go
Enter test results, water changes, dosing, new corals, and photos right from the tank. Quick-log tools make it a few taps each.
See the whole picture
Trends, health status, upcoming tasks, and reef value come together on one dashboard, so you always know what your reef needs next.
More than a logbook
Meta Reef is also a coral marketplace with 10,000+ live listings from stores and fellow hobbyists. Your tank data connects to it: catalog corals you own, price your reef from live listings, and find your next frag—all in the same free account.
Frequently asked questions
Is Meta Reef tank management really free?
Yes. Tracking parameters, logging maintenance, scheduling reminders, cataloging livestock, storing photos, and tracking spending are all 100% free. You can create an account and set up your first tank in a couple of minutes.
What reef parameters can I track?
All ten of the parameters reef keepers care about: temperature, salinity, pH, ammonia, nitrite, nitrate, calcium, alkalinity, magnesium, and phosphate. Each is logged over time and charted so you can see trends, and each has a target range that flags out-of-spec readings.
Can I manage more than one tank?
Absolutely. You can add as many tanks as you keep—display, frag, quarantine, freshwater, or planted—each with its own parameters, livestock, photos, reminders, and target ranges. Cross-tank views roll up your livestock and spending across the whole rack.
Do I need special equipment or a controller?
No. Meta Reef works with plain hobby test kits—just type in your readings. If you already run a controller or dose manually, you can log those readings too. There is no hardware to buy and nothing to wire up.
How is this different from a spreadsheet?
A spreadsheet stores numbers; Meta Reef interprets them. It compares each reading to a target range, charts trends automatically, reminds you when maintenance is due based on your own cadence, and connects your logs to your livestock and photos—then values your corals from the live marketplace. It is built for reefs, not rows.
Does it connect to the Meta Reef marketplace?
Yes. Your livestock inventory links to real coral listings, and your Reef Value is priced from live marketplace data, so as you track your tank you also learn what it is worth and where to find your next frag.
Give your reef the care it deserves
Join the reef keepers tracking their tanks on Meta Reef. Set up your first tank in minutes—it's free, forever.