Originally Posted by Iorek
because it difficult to establish it in small tanks and it can crashed any time which will compromised betta health.
"It is because it is" is not an explanation of why what or how. Why do you think it's difficult to establish a cycle in a small tank? What about the tank being small makes it difficult? How does a cycle just up and crash one day?
You say it can crash at any time, like its a ticking time bomb or something. Not something that i agree with, but ill roll with it. so let's just say something does happen to the cycle. Where does that leave you? With an uncycled tank, which is different than the uncycled tank of people who "choose not to cycle" in what ways?
Cycled tanks can have mini-cycles, which are incidents where the bacteria colony is overloaded (or compromised in some manner) and so there is an excess of ammonia in the water while the bacteria colony plays catch up. Generally, mini cycles fix themselves within a few days. So, even if someone who had a mini cycle were totally unaware of it, the problem would no longer be a problem by the time someone who "doesn't cycle" would be doing the aforementioned scheduled water change.
Lastly, the possibility of something happening at some unknown future time is not a reason not to so something. That's like saying "you can get in a car accident at any time, so don't drive".
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