Cycle Tracker
Log your test results while your tank cycles, watch the numbers move, and find out when it's safe to add fish. New to this? Read how cycling works first.
Trends
Each chart has its own scale. A healthy fishless cycle looks like an ammonia drop, then a nitrite rise and fall, while nitrate climbs.
Log a test
Your log
The day you first added ammonia.
Your log is saved in this browser only. It won't follow you to another device.
Cycling tips
Test every 2 to 3 daysDaily testing isn't needed until you're close to the finish.
Keep ammonia goingWhen ammonia reads 0, add more to about 2 ppm so the bacteria keep growing.
Warmer is fasterBacteria grow faster in warm water, around 78 to 82°F, with the filter running.
Watch your pHCycling can stall if pH falls too low. A water change usually brings it back up.
Don't clean the filterThe bacteria live in the filter. Leave it alone until the cycle is done.
No fish yetAdding fish before the cycle finishes is the most common way new tanks lose them.