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Changing the hob filter


begemi

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Hi guys,

I just got in the mail a new AC filter to replace my old Chinese and extremely noise hob filter. The tank I'm going to place it in is fully cycled and water change isn't due until 4 days from now. My question is: can I just change the old filter for the new one (not switching the filter media) without having them both run for a few days? I tought I could do that and start adding some Seachem Stabilty to help the filter accumulate beneficial bacteria.

M

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If you replace all the filter media you would lose your cycle and need to start again.

 

I would either run both for a while or put the media from your old filter into your new one. I've never found Stability much help at all

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The aquarium's cycle is inside the filter, not in the water. Changing the filter media would mean that you have to start the cycle over again.

 

Run both filters simultaneously for around 2 weeks, then remove the old filter and watch for a cycle bump. 2 weeks would allow for enough time so that the cycle would build inside the other filter and stabilize.

 

Another option would be to put the old media in the new filter with the new AC biomedia. This way you can seed the new biomedia with your cycle.

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Thank you FishiMandy and ChelseaM for clearing this out! I wish It could be done faster. I guess ear plugs are the only solution for the time being.

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I'm planning on moving the old filter aka "the hell raiser" to another tank where I need more filtration and that is why changing the media was not an option and I looked for your advice. I decided that I'll keep them both running for at least 3 weeks. It's a very small tank where are have them now, about 10gl, so I guess 3 weeks will be enough.

Shakaho, the new filter is A20 and the old one is, according to specifications given by the manufacturer, something more or less equivalent to AC50. I finished cycling the tank ( and that was fishless cycling by the way) last week so the media is not that old or crazy dirty either.

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