|12-25-2012 05:00 PM|
Nitrifying bacteria are not fast growing species.
If they are constantly being removed from one area (filter media) then the best population will be elsewhere in the tank. On the substrate, on plant leaves and stems, on driftwood...
Then you introduce new filter media and the bacteria start growing on it. But all the established bacteria are taking a lot of the ammonia, so there is not a lot available to the bacteria trying to get going on the new filter media. So growth is slow. Then that media is thrown away, and the bacteria in the rest of the tank remains to take care of the ammonia.
Throwing away the filter media, or cleaning it with chlorinated water often enough to keep the bacteria population very low is not going to cause a significant cycle in the tank as long as there is other media (substrate etc.) for bacteria.
Note R.sok's post, #12. A bare bottom tank has more bacteria in the filter, so the loss is significant.
Plants are also a part of the bio filter, and they also help pick up the slack when small amounts of bacteria are removed.
|12-25-2012 03:32 AM|
|The Dude||What's your tank size and fish load? I wouldn't do the filter anytime near the substrate (I'd wait at least 6 weeks), not that you were considering it. As others mentioned, I think you'd be fine as long as your stocking level isn't crazy|
|12-20-2012 03:32 AM|
If it is abundant, then bacterial growth will be exponentially faster. There are also other factors such as quorum sensing that will play a role in the rate of bacterial growth.
The other areas that bacteria can colonize will generally have slower/less dense growth.
For filters such as HOB that have smaller surface areas, replacing the media completely may not result in a mini cycle. Do the same for a canister filter, and you may see different results.
|12-20-2012 01:45 AM|
|12-19-2012 11:01 PM|
|R.sok||Yeah I also believe most of the bacteria is in the filter pad, however depending on how your tank is setup I've never had negative affects doing it this way & will continue doing it the same way I've always have. Except for a bare bottom tank. I've had a mini cycle happen with a bare bottom before|
|12-19-2012 08:34 PM|
They will just colonize anywhere and everywhere. For sure they are present on ornaments, hardscape, the substrate, etc.
However, the total surface area of these is probably less than the surface area available in filter media. Some filter media like sintered glass, etc are very porous, having extremely high surface areas that allow for greater (denser) bacterial colonization.
|12-19-2012 12:32 PM|
I have to believe though that in a mature tank, most of the beneficial bacteria is elsewhere than the filter media. It's hard to believe that the majority of your colony will keep going back to the same place that gets disposed of on a regular basis. It seems to make much more sense that even without biowheels it will find other places which are not so regularly cleaned, like the inside of the intake and filter housing, plants, other decorations, back glass, and yes substrate.
|12-19-2012 04:13 AM|
|R.sok||For cleaning the filter pad I've always rinsed it in the sink, That's right! straight tap water. It may be the wrong way of doing things but I've been doing it like this for years with no negative effects|
|12-19-2012 02:58 AM|
No need to spend extra money if you don't have to
|12-19-2012 02:47 AM|
|fishkeeper01||i hav marineland hob filters that hav a wheel jus for beneficial bacteria to grow on, so it makes it ok to jus throw away the filter pad every month(once a month i shud say).|
|12-18-2012 09:33 PM|
I have my media in mesh bags, so I just give them a swirl in the bucket.
If you have those HOB filter pad-type cartridges, you can do the same, or just use a (new) brush and dislodge any detritus.
|12-18-2012 09:01 PM|
|summerboy1958||How do others clean their filter media w/o killing the bacteria? I have a HOB with 2 filter media sections (no carbon). At the end of 2 weeks, it is covered with a brown mess. I have to use the kitchen sink hose to get it clean, but I am sure that does in the bacteria with the chlorinated tap water.|
|12-18-2012 07:00 PM|
|12-18-2012 09:23 AM|
|fishkeeper01||thanx, cuz i read on a few oter sites and have been told that when changing substrate it takes out a lot of beneficial bacteria.|
|12-18-2012 07:00 AM|
|Darkblade48||Pretty much. Nothing too special. If it isn't obvious, you'll need to drain the aquarium as well.|
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