Re: tetra schools
I am not an expert by any means, but I would define a "cycled" tank as the tank capable of converting toxic chemicals produced by your fishload (ammonia, then converted to nitrite) into less into much less toxic chemicals (nitrate) by means of biological filtration (bacteria).
This is different from just no/low levels ammonia or nitrites in the tank - tap water by itself doesn't have any, but it's not "cycled" (no bacteria), right?
There are more complicated details, such as lower "bad" ammonia ratio with low pH, adding salt to make nitrite less harmful for fish - I am not an expert, may be somebody knows it better. As well as how the fish you want to buy is going to tolerate "cycling".
PS. With the first tank here I, personally, started with 2 cory cats, when ammonia dropped added 6 glowlight tetras and after ammonia and nitrite disappeared completely started to add more sensitive fish.
Good luck.
PPS. When I was a kid cycling always lasted only as long as your patience and it worked most of the time for me.
Edit: I had an ammonia spike after moving into a new tank with ADA soil (had no choise of keeping 2nd tank) - I just did water changes often. I know it's not a good approach even according to a normal (non-PETA) people, but my fiish somehow didn't show any signs of stress (low pH?) didn't loose any fish over it.
I am not an expert by any means, but I would define a "cycled" tank as the tank capable of converting toxic chemicals produced by your fishload (ammonia, then converted to nitrite) into less into much less toxic chemicals (nitrate) by means of biological filtration (bacteria).
This is different from just no/low levels ammonia or nitrites in the tank - tap water by itself doesn't have any, but it's not "cycled" (no bacteria), right?
There are more complicated details, such as lower "bad" ammonia ratio with low pH, adding salt to make nitrite less harmful for fish - I am not an expert, may be somebody knows it better. As well as how the fish you want to buy is going to tolerate "cycling".
PS. With the first tank here I, personally, started with 2 cory cats, when ammonia dropped added 6 glowlight tetras and after ammonia and nitrite disappeared completely started to add more sensitive fish.
Good luck.
PPS. When I was a kid cycling always lasted only as long as your patience and it worked most of the time for me.
Edit: I had an ammonia spike after moving into a new tank with ADA soil (had no choise of keeping 2nd tank) - I just did water changes often. I know it's not a good approach even according to a normal (non-PETA) people, but my fiish somehow didn't show any signs of stress (low pH?) didn't loose any fish over it.
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