waterdrop
Enthusiastic "Re-Beginner"
This is a good rough outline of the fishless cycling process and if you keep a good fishless cycling thread going here in the beginners section the members will help you with all the ups and downs of the process. The fishless cycling period of tank startup has even more value as a time to learn lots of core beginner things from the members.Testing during fishless cycle is not to see if anything goes wrong, but to monitor how things are going in the cycle.
You will be adding ammonia. Once it shows up around 5ppm on the test, you stop adding ammonia. Then you wait. Once the ammonia ppm goes down to 0ppm, you add ammonia to get it back up to 5ppm. Then you start watching the nitrites, which will start rising. During this, you keep adding your ammonia to 5ppm once it drops to 0ppm. Eventually, the nitrites will drop to zero. Then you will keep adding ammonia until the ammonia and nitrite levels turn to 0 within 12 hours of adding the ammonia.
If the pH level starts changing drastically during the fishless cycle, a small water change may be necessary. Once the cycle is all done, change a large amount (50%) of the water and check the nitrates. If the nitrates seem high, change the water again.
I would note though in the above description that its generally more effective to do "down to the substrate" water changes (if a water change is needed at all) during fishless cycling. A large water change is much more effective at removing a lot of nitrite and nitrate and at replenishing some mineral content courtesy of the tap water. The large water change prior to introducing fish should also be a complete water change and all water changes should be done via substrate cleaning, which helps with nitrate removal and gives the beginner practice at that skill.
~~waterdrop~~
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