Cycling

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tothna

Candiru
MFK Member
May 18, 2005
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So I got a new 55 gal a couple of weeks ago and this is the first time I've really cycled a tank before putting fish in it, now that I know what I know about this hobby(although I've never lost a fish due to this). So my ammonia is at 0 but my nitrates and nitrites are high, should I do any water changes or just keep waiting for these levels to go down to complete the process? Would doing a water change actually prolong the process?
 
tothna said:
So I got a new 55 gal a couple of weeks ago and this is the first time I've really cycled a tank before putting fish in it, now that I know what I know about this hobby(although I've never lost a fish due to this). So my ammonia is at 0 but my nitrates and nitrites are high, should I do any water changes or just keep waiting for these levels to go down to complete the process? Would doing a water change actually prolong the process?


Howdy,

if you get the chance, buy some bottled bacteria in the pet store. They're not very expensive and the benefits of using them are great: They speed up the natural process of bacterial growth by introducting like a gazillion at once :D

I don't think water changes affect this process, since the primary location for bacteria is the filter (followed by gravel/sand). Of course, you shouldn't change water right after you've added bacteria (if you decide to do so). Also, use good dechlorinator!

HarleyK
 
stress zyme is great, I've used it on every aquarium I've set up since i got back into fish, and I barely even get an ammonia spike.
 
It's a good sign that you have nitrites and nitrates. That means the first stage of your cycle is complete. I'd wait until both ammonia and nitrites go to zero before doing a massive water change to bring the nitrates down.

BTW, how are you cycliing your tank? Are you doing a "fishless cycle" using pure ammonia, feeding it, or using "expendable" fish?
 
HarleyK said:
Howdy,


I don't think water changes affect this process, since the primary location for bacteria is the filter (followed by gravel/sand). Of course, you shouldn't change water right after you've added bacteria (if you decide to do so). Also, use good dechlorinator!

HarleyK

Doesn't the stuff(ammonia, nitrates, nitrites) in the water cause the bacteria to grow though?
 
Dont change the water.keep adding the ammonia.when ammonia and nitrites read 0 do water changes to get your nitrates in line then add fish
 
tothna said:
Doesn't the stuff(ammonia, nitrates, nitrites) in the water cause the bacteria to grow though?

Howdy,

Actually, these are bacterial waste products. The fact that ammonia and nitrites go down in an established tank is due to the increased activity of beneficial bacteria that convert the organic matter (containing N) straight into nitrates. A few bacteria also convert ammonia and nitrites into nitrates. But don't count on them. In an established tank, they run out of food and play no role.

HarleyK
 
I've cycled all my tankz using fish less cycles and I like it A LOT Better! You can get more fish cuz your bioload capacity is larger, and you can get fish sooner. Just works out better...plus your not hurtin any 'expendable' fish....:(
 
I'm a big fan of the fishless cycle for many of the same reasons PP cited. Besides, U2 cast some doubt on the compatibility of fish and cycles, noting, "A woman needs a man like a fish needs a bicycle." ;)
 
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