Aquarium guides, written for the logbook
Each guide is built around what you should record and why — because the numbers only help if there is a history behind them.
How to cycle a new aquarium (fishless, day by day)
What actually happens during the nitrogen cycle, how long each stage takes, the readings that tell you where you are, and when it is safe to add fish.
Read the guide → Troubleshooting · 6 min readAmmonia spike: what to do in the first 24 hours
A step-by-step response to a positive ammonia reading — what to change, what not to do, and the two numbers that decide whether you need to act tonight.
Read the guide → Maintenance · 7 min readHow often should you change aquarium water?
Interval and volume by tank size and stocking — plus the nitrate maths that turns “about 25% weekly” into a schedule you can defend with your own numbers.
Read the guide → Stocking · 9 min read9 best aquarium fish for beginners (that stay small)
Small, hardy, forgiving species that work in a 5- to 20-gallon tank — with the parameters each one actually needs and the mistakes each one punishes.
Read the guide →Read it, then log it
Every guide here maps to something you can record in the app — a test result, a water change, a reminder. That is the point of the log.
Open the App Store link →