Water parameters with graphs
Salinity, KH, Ca, Mg, NO3, PO4, pH, temperature, ORP. Target ranges, alerts and time-series charts.
Marine aquarium app
The app built for marine aquarium keepers.
Track water parameters, schedule maintenance, log corals, fish and equipment — all in one app, free for iOS and Android.
ReefFlow centralizes the routine of a marine aquarium.
Anyone keeping a marine aquarium knows the hard part is not setting it up — it is maintaining it. Salinity drifting, alkalinity dropping, missed water changes, notes lost in random notebooks, spreadsheets that nobody updates. ReefFlow exists to fix that: a mobile app built specifically for marine and reef tanks, focused on routine, parameters, livestock and equipment.
In ReefFlow you register each aquarium with its volume and stocking, log every water test (salinity, alkalinity, calcium, magnesium, NO3, PO4, pH, temperature, ORP), schedule maintenance and dosing, keep a journal with photos and progress, and use built-in calculators for salt mix, alkalinity, dosing and water changes. Plus ReefMind, an AI trained on marine parameters that reads your history and suggests adjustments.
It is not a generic aquarium app with a blue theme. It is built end-to-end for saltwater — from a 50L nano reef to a 1000L+ mixed system.
Who it is for
- Beginner reefers who want a clear routine from day one
- Experienced hobbyists tired of juggling parameters, dosing and notes across apps
- People planning a new marine tank who want to think before they spend
- Anyone done with spreadsheets, notebooks and 4 separate apps
- Aquarists who want long-term history with readable graphs
- Hobbyists looking for an app that takes marine seriously
Aquariums organized
Each tank with volume, equipment, livestock and config. Multiple tanks without confusion.
Maintenance never missed
Water changes, skimmer cleaning, media swap, dosing. Recurring reminders and full history.
Journal with photos
Document the evolution of the tank with photos and notes. Track wins, problems and milestones.
Reefpedia
Over 1,000 species of marine fish, corals and invertebrates with care, compatibility and lighting.
Reef calculators
Salt mix, alkalinity, Ca/Mg dosing, water change volume, refractometer correction. All inside the app.
Download ReefFlow and organize your marine tank today.
Free for iOS and Android. No invasive ads, no spreadsheets, no headache.
FAQ — marine aquarium app
Does ReefFlow work for any marine tank?
Yes. FOWLR, mixed, soft, LPS, SPS — from nano to large reef tanks. Parameters, species and equipment are all saltwater-focused.
Do I need to pay?
No. Download is free. Core features (parameters, maintenance, journal, calculators, catalog) are free. Optional in-app purchases unlock advanced features.
Which languages are supported?
English, Portuguese and Spanish — UI, content and support.
Can I track multiple aquariums?
The free plan includes 1 aquarium. Paid plans unlock multiple aquariums in the same profile.
Which parameters can I track?
14 parameters in total: salinity, alkalinity (KH/dKH), calcium, magnesium, NO3, PO4, pH, temperature, ORP and more — plus custom parameters.
Does it work offline?
No. ReefFlow requires a connection — data syncs to the cloud in real time.
Is SPS supported?
Yes. Target ranges, dosing and SPS species coverage are first-class in Reefpedia and the calculators.