05-04-2007, 10:25 AM
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In an undergravel filter, all the beneficial bacteria has to be in the gravel, yes?
I am turning my small tank into a fry tank, and so don't want any gravel in it. Therefore I have to take out the undergravel filter and put in a normal sponge filter. I have the new filter for it currently running in another tank alongside the original one for that tank so it won't be "new" so to soeak when I put it in. What I am wondering though is will the tank still have to cycle, or will it just be a wee mini-cycle?
All gravel and the undergravel filter are coming out. The water will have to be changed to make it easier for me to gtet all the gravel out, then the used filter will be going in. The heater and an ornament will remain there.
I'm a bit confused as to what will happen here?