Swapping 1 of 2 filters - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 10-17-2011, 10:20 PM Thread Starter
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Question Swapping 1 of 2 filters

I would just do it but thought I would see what the experts had to say. I have a friend I help with their tank (disabled and cant do own water changes and stuff). His tank has 2 walmart brand HOB filters one big one (two cartridges) and one small one (one cartridge). I dont think the filters are working like they should despite cleanings, one makes a noise ( I think motor going out) and other doesnt move much water. Yes Ive taken them apart and cleaned the impellars and all.

My wife and I want to buy them a new Aqua Clear 70 for their tank as our LFS has a great deal on them right now. His are cheap filters and I really dont want to just replace the motor.

If I remove the larger filter (its making all the noise) and replace it with the new one will their be any problem with the tank "min-cycling" from the reduced amount of bacteria going through the filters?

Anything I should do like soak the media in his tank for a few days first, or leave the media from old filter sitting inside the tank?

Any advice would be good as he has some really beautiful guppies in his tank that have taken him alot of years to develop and I dont want to see them harmed.

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post #2 of 3 Old 10-17-2011, 10:54 PM
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If you are upgrading to an AquaClear filter...there will be room to stick the media from the old filter in next to the media in the AC filter. Do this and leave in there for a couple weeks and the new media will be seeded by the old.
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post #3 of 3 Old 10-18-2011, 10:02 AM
I believe the Wallymart filters are AquaTech's and the cartridge will not fit inside the Aquaclear filter. Setup the AQ 70 filter with the sponge and bio-max (carbon optional). Now either hang one or two of the Aquatech cartidges in the tank, OR you might use scissors or a razor knife to cut the filter media off and place inside the AC70 and discard the plastic and the carbon. Either works and is not critical as there is plenty of biology in the substrate and decor of an established tank so unless the tank is way overstocked, even the removal of the cartridge filter would be compensated for fairly quickly.

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