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Discussion Starter · #1 ·
I am moving a fully cycled 2013 Eheim from a 10 gallon tank to a 25 gallon new tank.

How long will it take for the new tank to fully cycle? Please share your thoughts.
 

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Discussion Starter · #5 ·
there will still be a spike of ammonia and because all the bacteria dont only reside in the filter, they live on rocks , and aquarium walls ect. and you will be leaving those behind
will it be immediately cycled?... no
will it cycle rather quickly?... yes
I was thinking the same way. If the full cycle usually takes 4-6 weeks, how short will be this one?
 

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If you move plant's as well to new tank ,there may not be much of an ammonia spike.
Otherwise, bacteria will multiply rather quickly to adapt to available food (fishes?)
Could be only a few day's of monitoring the water, and bacteria colony would be sufficent for number's of fish from old tank assuming that is all that's added .
If adding new fishes as well.. then a bit longer.
Still beat's four to six week's or longer. IMHO
 

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The bacteria double or replicate every 16 to 20 hours. Given appropriate levels of ammonia and nitrite. Your bacteria will double in one day. And double that the day after. Id say two days tops for ur filter to be at capacity. And ur tank glass decor and substrate will follow rather quickly
 

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Discussion Starter · #8 ·
The bacteria double or replicate every 16 to 20 hours. Given appropriate levels of ammonia and nitrite. Your bacteria will double in one day. And double that the day after. Id say two days tops for ur filter to be at capacity. And ur tank glass decor and substrate will follow rather quickly
I don't quite understand as to why my filter is not its capacity at this time already. Would not it just be covered with bacteria?
 

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I don't quite understand as to why my filter is not its capacity at this time already. Would not it just be covered with bacteria?
Just like other living being the size is = to the amount of available food, in this case ammonia and nitrate so there may be a bit more "food" in the 25 than the 10 (lots of factors in play here so that statement may or may not be accurate). I have done rescapes with fresh substrate and hardscape and found that as long as I do daily 50% water changes I can minimize any issues. For planted tanks ammonia can also mean algae so there are many good reasons to do this. Sadly I didn't do any kind of scientific analysis of the process so generally my comments are here say.
 
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