Changing substrate while cycling tank - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 03-29-2008, 12:28 PM Thread Starter
 
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Changing substrate while cycling tank

I am currently cycling a 10 gallon tank and after seeing some other ideas I'd like to change (actually add substrate) to the existing substrate. Right now it's nothing more than gravel but I would like to add a few sections in the background with some soil capped with gravel. Similar to this...




Again, I'm cycling the tank at the moment so I'm guessing I would disturb the cycling process if I were to drain most of the water, correct? Another thought I had was to finish the cycle then do a 90%-100% water change and add the soil at that time. Would this work or would I have to recycle?
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post #2 of 2 (permalink) Old 03-29-2008, 11:03 PM
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Disturbing the substrate of a tank, new or old, will interrupt the cycle. The substrate is a major portion of a tank's biological filter. Since you're cycling the tank right now, it's not really something to worry about. Worst case is you just prolong your cycling process a little bit. Finishing your cycling and then topping the gravel will cause what is called a mini-cycle. So, just make your changes now.

75 Gallon Planted Tank
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