Tropical Fish Keeping - Aquarium fish care and resources

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Aquarius Keeper 10-25-2008 04:29 PM

switching filters in cycled aquarium
Hi everyone -

When I first set up my 30g I had a 20g whisper filter on the top, and a submersible filter at the bottom of the tank.

fortunately, the latter has turned out to be a piece of junk, so now I've just the 20g filter for a 30g tank ... it's taking a while but I am starting to see traces of ammonia.

So it's time to put in a stronger
filter - but of course, most of my good bacteria is in the old filter. I'm guessing I'll have to leave both running at the same time for a while. Has anybody else had to do this? How long do you usually give it before pulling the old filter out? (I'm going to use it elsewhere...)



okiemavis 10-26-2008 08:49 PM

Why not leave both running forever? That would be awesome filtration for a 30G tank :)

If not, I'd both running for a month or so, then take the insert out of the old filter, but leave it running, and then after a bit take the old filter out all together.

1077 10-27-2008 06:32 AM

:-) Im with Okiemavis!

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