TanksConnected
Aquarium tools and tank tracking
Free aquarium tools first.
Save your tanks when you’re ready.
Use practical fishkeeping tools without an account. Check cycling results, stocking, compatibility, tank volume and water changes, then create a free account when you want to save your tanks and track long-term history.
No account needed
Try the tools instantly
Nothing is saved unless you choose to create an account.
Cycle checker
Stocking preview
Compatibility check
Water change maths
Free account
Save your aquariums
When you want records, history and saved tank profiles, create an account.
Saved tanks
Water test logs
Water changes
Maintenance history
Free aquarium tools
Start with a quick check
Plan before you buy
Use adult fish size, stocking and compatibility checks before the tank becomes a problem.
Track the pattern
Saved accounts let you connect water tests, water changes, stocking and maintenance history.
Built for fishkeepers
Designed around real aquarium routines, with community features and chat growing alongside it.
Account version
Save your tanks properly
Keep the full record: tanks, fish, filters, water tests, water changes, maintenance, notes and aquarium history.
Learn and grow
Guides
Further fishkeeping reading
Useful external aquarium advice
TanksConnected tools are designed to help with planning and record keeping. For general fish welfare and beginner fishkeeping advice, these external resources are useful starting points.
Free aquarium tools first
Free aquarium tools for real fishkeeping decisions
TanksConnected helps aquarium keepers check the important things before they become expensive mistakes. Use the free aquarium tools to estimate tank volume, plan stocking, compare freshwater fish compatibility, understand cycling test results and work out sensible water change amounts.
The tools are built around everyday aquarium care. They help answer questions like whether a fish tank is large enough, whether two species are likely to mix, whether bioload is getting too high, and what to do next when ammonia or nitrite appears during a cycle.
You can use the calculators without creating an account. That makes TanksConnected useful when you are planning a new aquarium, checking a stocking idea at the fish shop, or trying to understand water test results quickly.
Save your tanks when you’re ready
Save tanks, livestock, tests and maintenance history
When you are ready, a free account lets you save your tanks and keep the useful history together. Add fish, filters and notes, record water tests, log water changes and build a clearer picture of each aquarium over time.
Keeping tank history makes aquarium care easier because patterns stand out. You can see when nitrate rises, whether maintenance is slipping, how stocking has changed and what has already been tried. That is far better than guessing from memory.
TanksConnected is designed for normal fishkeepers running real aquariums, not perfect spreadsheets. It is useful for new tank setup, fish tank cycling, stocking checks, compatibility planning, maintenance tracking and long-term aquarium records.
Fish tank cycling tool
Use Cycle Coach to read ammonia, nitrite and nitrate results and get practical next steps for fish-in or fishless cycling.
Aquarium stocking calculator
Check adult fish size, bioload, group needs, temperament and stocking pressure before adding more fish to the tank.
Freshwater fish compatibility checker
Compare obvious compatibility risks such as aggression, size differences, group needs, territory and fin nipping before mixing species.
Aquarium care without guesswork
Plan, check, save and review
Good fishkeeping is mostly about steady routines and sensible decisions. TanksConnected brings the common jobs into one place: planning a tank, checking stocking, reviewing compatibility, tracking water changes and saving water test results.
The aim is simple: give aquarium keepers enough information to make better choices without making the hobby feel like admin. You can start with one free tool, then build up a complete tank record when it becomes useful.
Built around freshwater aquariums
Useful for beginners and experienced keepers
Beginners can use the guides and cycle tools to understand what is happening in a new tank. More experienced keepers can use saved tanks, stocking checks and maintenance history to manage several aquariums without losing track.
TanksConnected will keep growing around practical freshwater fishkeeping: better calculators, clearer tank records, species information, plant information, community features and tools that help keep fish healthier.