· below the surface
Out now on iOS and Android
Something wrong
with your fish?
Snap a photo. AI Aquarium Doctor reviews it with your symptoms, water results, and tank details to suggest a likely condition and treatment plan — in seconds, not after hours on forums.
Free to start · No account required · iPhone and Android
Full context
photos, symptoms & water
0–100
live tank health score
47
languages spoken
Free
to start, every week
· app previews
Daily aquarium care, organized in one calm flow
Move from tank health to water testing, AI checkups, and care schedules without losing the thread.
· how it works
From “what is that?” to a treatment plan, in three steps
Step 1
Snap a photo
Guided shots of the fish and the concern — a close-up of the spots, fins, or behavior that worries you.
Step 2
AI reviews the full picture
Photos, symptoms, and your actual water parameters are weighed together — the diagnosis knows your tank, not just your fish.
Step 3
Follow the plan
Step-by-step treatment with confidence levels, logged to your journal — and Finley on call for follow-up questions.
· diagnosis
An aquatic vet’s eye, on every photo
The AI reviews patterns associated with concerns such as ich, fin rot, dropsy, velvet, and swim bladder issues. Every checkup suggests a likely condition, shows its confidence, and offers treatment steps you can follow. Every inhabitant keeps a full health history.
- Works for fish, shrimp, snails, and corals
- Free species identification for new arrivals
- Honest uncertainty — “best guess, double-check me” when it isn’t sure
· chemistry
Water chemistry, decoded
Log a test strip in seconds and watch it become a single, honest number: a 0–100 health score that always flags toxins first. Ammonia, nitrite, nitrate, pH, KH, GH, temperature, salinity — with safe ranges tuned to freshwater, saltwater, brackish, or reef.
Trends build over time, so a slow nitrate creep gets caught weeks before your fish would tell you.
· care
Care that runs itself
Water changes, filter rinses, feeding, dosing — scheduled once, remembered forever. Reminders land exactly when a task is due, one tap logs it to the journal, and vacation mode holds the fort while you’re away.
New tank? The cycle journey walks you through the nitrogen cycle day by day, and insight cards surface what needs attention before you have to ask.
Finley
online · knows your 2 tanks
My water’s gone cloudy overnight — should I panic?
· finley
Meet Finley, your AI aquatic vet
A friendly axolotl who has actually read your tank. Finley answers with your real parameters, inhabitants, and history in mind — cloudy water, stocking ideas, a scary diagnosis, or the best order to do today’s maintenance.
Generic forum advice guesses. Finley checks your numbers first.
· and the rest of the reef
Species ID, free
Point the camera at a new arrival and get its name — fish, shrimp, snails, and corals.
Stocking advisor
Compatibility and bioload checked before you buy, not after the chase starts.
One journal
Tests, maintenance, checkups, notes, and photos land in a single timeline per tank.
Cycle journey
Day-by-day guidance through the nitrogen cycle for brand-new tanks.
Every tank type
Freshwater, saltwater, brackish, and reef — ranges and advice adapt to each.
Synced & backed up
Secure cloud sync keeps every tank, test, and journal entry safe across devices.
At home with every keeper
· pricing
Start free. Stay free, or go unlimited.
Free
Everything a healthy tank needs
- 3 AI checkups every week
- 5 Finley messages a day
- Unlimited water tracking & health score
- Species ID, schedules & journal — always free
Premium
For the fish room, not just the fish bowl
- Unlimited AI checkups
- Unlimited Finley, any time of night
- Every free feature, no meters anywhere
- Monthly or annual — cancel anytime
Prefer pay-as-you-go? Credit packs cover extra checkups without a subscription.
· faq
Questions, answered
Where can I download AI Aquarium Doctor?
AI Aquarium Doctor is out now on the App Store and Google Play, free to start on both. Search for it by name, or use the download buttons on this page.
Is AI Aquarium Doctor free?
Yes. Every week you get free AI checkups, plus free daily messages with Finley. Water chemistry tracking, species identification, care schedules, and the tank journal are always free. Premium unlocks unlimited checkups and unlimited Finley.
How does the AI fish disease diagnosis work?
You photograph the sick fish, shrimp, or coral and describe what you see. The AI reviews the photo alongside the symptoms, water results, and tank details you provide to suggest a likely condition, show its confidence, and offer a step-by-step treatment plan.
Which aquariums does it support?
Freshwater, saltwater, brackish, and reef tanks. Safe parameter ranges, the tank health score, and care advice all adapt to your tank type — from a betta bowl or planted nano tank to a full coral reef system.
Which water parameters can I track?
Ammonia, nitrite, nitrate, pH, KH, GH, temperature, salinity, and more. Every test feeds a live 0–100 tank health score that always flags toxins first, and trends over time show problems before your fish feel them.
Does it replace a veterinarian?
No. AI guidance is a fast, informed starting point — for severe or worsening conditions, always consult a qualified veterinarian or aquatics specialist. The app tells you the same thing.
Which languages are supported?
The app speaks 47 languages, including English, French, German, Spanish, Portuguese, Italian, and Japanese.
Guides
The long answers — written out properly, so you can read them before you need them.
- Ammonia spike: the 24-hour plan when fish are gaspingFish at the surface, red gills, a reading above zero — ammonia is the aquarium emergency that kills fastest and is easiest to fix. What to do in the next hour, the next day, and the next week.
- Cloudy aquarium water: what each colour means and how to clear itMilky white, green, or a brown tint — cloudy water is three different problems with three different fixes, and only one of them is dangerous to your fish.
- Fin rot: why the fins are fraying and how to stop itRagged, shrinking fins with a white or red edge are a bacterial infection with a water-quality cause. Here is how to tell it from nipping, and the two-part fix that actually works.
- White spot disease (ich): how to recognise it and treat itTiny white grains on the fins and body, flashing against the gravel, then gasping — ich is the most common fish disease and one of the most curable, if you understand its life cycle.
- How to start a new aquariumA six-week, fishless plan for cycling your first tank — what to buy, what every reading means, and how to know the day it's safe to add fish.
· the floor
Your fish can’t tell you
what’s wrong. Finley can.
AI Aquarium Doctor is out now on the App Store and Google Play — free to start, in 47 languages.