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Re: help with old filter and new filter

Subject: Re: help with old filter and new filter
by Fishlady on 15/5/2014 6:45:17

Move the media as this.foolish.heart suggests. Running two filters side-by-side when one is mature and has enough bacteria for the tank's bioload is not a safe way to proceed. The bacterial colonies only ever grow to a size sufficient to cope with the bioload of the tank. They also stick very firmly to the media and don't go travelling in the water so at whatever point you remove the old filter you will be at risk of a spike in ammonia/nitrite or even having to do a full fish-in cycle. If you move the media into the new filter you also move the bacteria so have an instant cycle on the new filter. If it won't fit, cut it up.