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"mindmeld" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > ok... so can i just keep the 'spent' carbon as a sponge alternative (ie. > bio-collector/host substance) and just replace all the floss? Yes.... and another point to also consider is that the nitrifying bacteria colonise all surfaces within the environment that provides food and O2. More generally colonise the filter because of the high water flow. I have seen various estimates concerning the percentages..... My guess is between 20% - 60% are on tank, gravel, and decoration surfaces. These bacteria can double in less than a day given proper conditions. > > Of course, this seems pretty much what i have been doing... except i've been keeping > a little of the floss each time. > > AcH, the non-compulsive filter maintainer. ( i let the newts tell me when to change > it) > > > > > > "mindmeld" <[EMAIL PROTECTED]> wrote in message > > > news:[EMAIL PROTECTED] > > > > so, i can ditch the carbon and replace it with a sponge?... <snip> > > > > > > Yes, as stated before, *unless there is a specific need for it*, > > carbon is > > > generally a waste of time and money, and will make little or no > > difference. > > > It has its uses, though. > > <snip> > > > your filter is doing it's job. Every time you remove and replace a bit of > > > media, you're losing some of your bio-filter bacteria colony. If you remove > > > too much, you may end up with an ammonia spike, and a mini-cycle has to > > > occur before the bacteria multipy, and everything evens out again. > > > > > > billy > > > > > > > > > > Here is a article on Activated Carbon that I thought was interesting: > > > > http://www.resintech.com/Content/TechArticles/Activated%20Carbon%20Filtration.pdf >
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