Manage
Aquariums, livestock, plants, equipment, and routines — all in one dependable record.
Now live on Google Play
A smarter way to manage every aquarium.
AquaNexus is an offline-first aquarium management app for tanks, livestock, water tests, maintenance, treatments, breeding, ponds and more. Start free with up to 5 systems, with optional Keeper and Advanced upgrades when you need more tools or capacity.
Aquarium knowledge library
Fish, plants, Field Notes, breeding, water, health, equipment, DIY builds and practical care.
Explore 2050 original guide pages across 18 connected topics, plus 1,343 searchable aquatic life entries and original AquaNexus Field Notes.
Original AquaNexus writing
Field Notes from behind the app
Read the fish-room records, dated equipment audits, breeding targets, build plans and decisions shaping AquaNexus.
Explore AquaNexus Field Notes →Species entries
Fish and livestock
Care, feeding, behaviour, breeding and common mistakes.
Browse fish guides →Plant care
Aquarium plants
Lighting, nutrients, propagation and practical troubleshooting.
Browse plant guides →Build safely
DIY aquarium projects
Racks, air systems and fish-room builds designed for maintenance and failure.
Browse DIY guides →Practical systems
Tips and tricks
Records, quarantine, breeding and everyday routines that hold up over time.
Browse practical guides →Why AquaNexus exists
Good care starts with clear information.
Aquarium keeping is rewarding, but the details add up. Test results, livestock, treatments, feeding, and maintenance often live in separate places — or get lost entirely.
This website is the official home of the AquaNexus aquarium management app. We are building it to bring aquarium information together in a way that feels calm, useful, and easy to trust. Not more noise. A clearer picture of the aquarium in front of you.
Everything in one place
Made for the care you already give.
AquaNexus helps keep the important details close, so every aquarium has a clearer record, a safer history, and room to grow.
Monitor
Log water tests, maintenance, and changes so patterns are easier to see.
Protect
Treatment notes, care history, and important warnings stay close when careful decisions matter.
Grow
Build knowledge and confidence over time, from a first tank to a full fish room.
Business
Support stock, sales, breeding records, and daily operations as your work grows.
Guidance
Future assistance will explain recommendations clearly and keep animal welfare first.
Plans
Start free. Upgrade when your setup needs more.
AquaNexus has a permanent Free plan for smaller setups. Keeper and Advanced are optional subscriptions that add extra tools and capacity. Eligible new subscribers can try a paid plan free for 7 days through Google Play.
Free
Free
A$0
Up to 5 systems
- Core tank, livestock, water-test and maintenance records
- Ask AquaNexus
- Backup and restore
- Readable data export
- Offline-first use with no AquaNexus account required
Keeper
Keeper
A$4.99/month
Up to 20 systems
- Everything in Free
- Plants, lighting and CO₂ tracking
- Supplies and equipment management
- Product expiry and recall tracking
- More detailed maintenance tools
- Secure Local Wi-Fi Sync
7-day free trial for eligible new subscribers
View Keeper on Google PlayAdvanced
Advanced
A$9.99/month
Up to 100 systems
- Everything in Keeper
- Breeding workflows
- Spawn, egg and fry tracking
- Sales and buyer records
- Business and sales history
- Pond Weather
- Advanced breeding and business workflows
7-day free trial for eligible new subscribers
View Advanced on Google PlayPrices shown are in Australian dollars. Google Play displays the applicable offer and final price for your account and region.
Built to grow with you
Wherever you are in the hobby, your records should grow with you.
- 01Beginner
Start simple, build good habits, and avoid common mistakes.
- 02Learner
Understand your aquarium as your confidence grows.
- 03Hobbyist
Keep every tank, routine, and record in one place.
- 04Breeder
Track the details behind each pairing, hatch, and generation.
- 05Fish room
Bring many tanks, routines, and care records into one workflow.
- 06Small business
Stay on top of stock, sales, care, and daily operations.
Public development roadmap
AquaNexus is live. Development now follows real-user feedback.
AquaNexus is publicly available on Google Play and includes a free tier for aquarium keepers managing up to 5 systems. Keeper and Advanced are optional paid upgrades. Eligible new subscribers can try a paid plan free for 7 days through Google Play. Development now follows real-user feedback, reliability work and practical improvements.
Read the full roadmap- Completed
Google Play public launch
AquaNexus 1.0.4 is live on Google Play with a free tier for up to 5 systems and optional Keeper and Advanced upgrades. The live product includes its core aquarium-management platform, offline-first records, backup and restore, Local Wi-Fi Sync, Master Transfer, Pond Weather and public knowledge tools.
- Now
Production feedback & product improvement
The current priority is listening to real users, fixing genuine production issues, improving confusing or repetitive workflows, polishing multi-device behaviour and strengthening the parts of AquaNexus that aquarium keepers use most often.
- Next
Refinement, content growth and measured expansion
Next work includes improving onboarding and feature discovery, expanding AquaNexus knowledge and aquatic-life content, broadening reliable source-water and weather coverage, validating monetisation flows and planning wider platform support as the Android product matures.
Support independent development
Support the next stage of AquaNexus.
AquaNexus is developed independently for aquarium keepers. If you believe in the project, an optional contribution can help with ongoing development, testing, hosting and product improvement.
Supporting AquaNexus is completely optional. It is not a purchase, charitable donation or guarantee of future features.
Support the developer
Send an optional tip through the developer’s public PayPal entry.
Tip with PayPalNothing is sold or promised in return. PayPal may display the recipient’s personal account name before you confirm.Feedback and ideas
Send your ideas directly to the developer.
AquaNexus is being shaped around real aquarium keepers. Share the features, problems, workflows, or ideas you think should be considered.
Your message will be sent through the website feedback form.
Questions, answered
Good to know.
What is AquaNexus?
AquaNexus is a live aquarium management app for keeping important records, understanding your systems and making day-to-day care easier.
Who is it for?
It supports aquarium keepers at different scales, from a first aquarium to breeders, fish rooms and larger multi-system setups.
Is AquaNexus free?
Yes. The Free plan supports up to 5 systems. Keeper and Advanced are optional paid upgrades for people who need additional tools or greater capacity.
How do I install AquaNexus?
Install AquaNexus directly from Google Play on a supported Android device.
Live on Google Play
Install AquaNexus and start with the Free plan.
Manage up to 5 systems without paying. If your setup grows, Keeper supports up to 20 systems and Advanced supports up to 100, with a 7-day free trial available to eligible new paid subscribers through Google Play.
1Install AquaNexus
Download the live Android app directly from Google Play.
2Start free
Use the Free plan for up to 5 aquarium systems.
3Upgrade only if you need to
Keeper and Advanced add more tools and capacity for larger setups.