Stable water. Happy fish. Fewer surprises.
Reef & Root turns Claude into an experienced aquarist. It coaches your cycle, checks every fish against every tankmate, reads your test results against the right targets, schedules your maintenance, does the dosing math and troubleshoots problems with husbandry first.
Get Reef & Root Aquarium Keeper for $15 Calculate my tank
- One-time $15
- Instant email delivery
- 14-day refund
- Works on any Claude plan, even free
Stocking check: 40 gal breeder, planted
Cycled · 76°F · pH 7.2 · soft-to-moderate water · Fluval canister
Bioload: 70% after planAdd over 6 weeks1 conflict found
- YesHarlequin rasbora x 10Mid level · peaceful · group of 8 or moreWeek 1
- YesPanda corydoras x 6Bottom · needs soft sand · likes 72 to 77°FWeek 3
- NoTiger barbs with your bettaKnown fin nippers · stress and torn fins likelySwap
- SwapTry ember tetras x 10 insteadSame water, peaceful, adds orange to the scapeWeek 5
Everything an experienced aquarist keeps track of
Freshwater community, planted, shrimp, cichlids and reef. One skill, six jobs.
Cycle coaching
A fishless cycle plan, your readings interpreted, and exactly when it's safe to add fish.
Stocking and compatibility
Adult size, group size, temperament, swim level and water needs checked for every pairing.
Parameter targets
Freshwater and reef targets, your results compared, and what to change (or leave alone).
Maintenance schedules
Daily, weekly and monthly tasks sized to your tank, with water change amounts.
Volume and dosing math
Real water volume, product doses and safe daily limits for alkalinity, pH and supplements.
Planted tanks and troubleshooting
Low-tech plant lists, light and CO2 balance, and algae, cloudy water and gasping fish sorted.
Ask it like you'd ask the expert at a good fish store
It looks at the whole tank, not just one number.
Nothing's wrong: you're in the nitrite stage, and it's progressing
Ammonia dropping to 0 and nitrate appearing means both groups of bacteria have started. Nitrite often lags and can spike high for a week or two.
What to do
- Keep dosing ammonia back to about 2 ppm when it falls to 0 so the bacteria keep eating.
- If nitrite has been off the chart for more than about a week, do a 50% water change (dechlorinated, temperature-matched). Very high nitrite can slow the bacteria that remove it.
- Keep testing every 1 to 2 days.
You're done when 2 ppm ammonia goes to 0 ammonia and 0 nitrite within 24 hours, two or three times in a row. Then a big water change, and add your first few fish.
Husbandry first
Most aquarium problems are solved with water, patience and the right tankmates, not bottles.
- Stable beats perfectIt won't have you chase pH with chemicals or swing your water around.
- Adult sizes, not store sizesThat cute pleco can reach 12 inches. It plans for the fish they become.
- Careful with medicinesSigns described, labels followed, quarantine tanks preferred, and an aquatic vet when it matters.
- Never releaseIt never suggests releasing fish or plants into the wild.
Up and running in two minutes
No app to learn and nothing to install on your computer. It lives inside Claude.
Buy once
Pay $15 by card, Apple Pay or Google Pay. Your download link arrives by email in about a minute.
Add it to Claude
Upload the ZIP in Claude under Customize, then Skills. It takes about 30 seconds. No setup, no accounts.
Just ask
"Can I add guppies to my betta tank?" "Here are my reef test results." "Why is my water cloudy?"
Start with the free Cycle Coach
A small skill that walks you through cycling a new tank, reads your test results and tells you when it's safe to add fish.
- Fishless and fish-in plans
- Your readings interpreted
- A simple cycle log
Get Reef & Root Aquarium Keeper
Pay once, use it for every tank. Includes the free Cycle Coach too.
How to add it
- Claude on the web or desktop: don't unzip it. Open Customize, then Skills, click +, choose Upload a skill and pick the ZIP. It works on any Claude plan, including the free one: just turn on code execution in Settings, Capabilities.
- Claude Code:
unzip reef-root-aquarium-keeper.zip -d ~/.claude/skills/ - Start a new chat and try: "Here's my tank and what's in it. Check my stocking and my latest test results."
Reef & Root Aquarium Keeper
Cycle, stock, test, maintain and troubleshoot.
$15 one time
- Cycle plans and test interpretation
- Stocking and compatibility checks
- Freshwater and reef parameter targets
- Maintenance schedules
- Volume and dosing math
- Planted tank planning
- Husbandry-first troubleshooting
- Updates for a year
Secure checkout by Stripe. Taxes calculated at checkout. 14-day refund.
Prefer to buy on Etsy? Get it on Etsy
New to Claude?
Claude is an AI assistant made by Anthropic, like ChatGPT. Reef & Root is a skill: a set of expert instructions you add to your own Claude account, so Claude answers like a experienced aquarist who knows the craft.
- Make a Claude account at claude.ai. Skills work on every plan, including the free one; paid plans give more usage.
- Turn on code execution in Settings, Capabilities (skills need it).
- Try the free Cycle Coach skill first. If you like it, the full skill is one purchase.
Not ready for Claude? The free volume and water change calculator on this site works in any browser, no account needed.
Questions
Freshwater or saltwater?
Both. Freshwater community, planted, shrimp, cichlid, brackish, fish-only marine and reef tanks, each with the right targets.
Can it diagnose a sick fish?
It describes what the signs commonly mean and checks your water first, since that causes most problems. For medication it tells you to follow the product label and consult an aquatic vet or experienced fish store.
Can I send a photo?
Yes. Send Claude a photo of your tank, algae or fish and it will use it, along with your test results.
Will it remember my tank?
It keeps a tank profile and test log you can paste into a Claude Project, so you can see trends over time.
What do I need to use it?
A Claude account on any plan, including the free one, with code execution turned on (Settings, Capabilities). Free accounts have lower usage limits, so long planning sessions go further on a paid plan. It works in Claude on the web, the desktop app and Claude Code.
What if it doesn't work for me?
Email hello@whatiflabs.ai within 14 days of buying and we'll refund you in full. No forms, no questions.