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- Newsgroups: rec.aquaria
- Path: sparky!uunet!think.com!enterpoop.mit.edu!bloom-picayune.mit.edu!irene.mit.edu!menudo
- From: menudo@irene.mit.edu (Roberto Estrada)
- Subject: Re: High Nitrates [M][Filtration]
- Message-ID: <23DEC199217334463@irene.mit.edu>
- News-Software: VAX/VMS VNEWS 1.4-b1
- Sender: news@athena.mit.edu (News system)
- Nntp-Posting-Host: irene.mit.edu
- Organization: MIT Lab for Nuclear Science
- Date: Wed, 23 Dec 1992 22:33:00 GMT
- Lines: 31
-
- In article <1ha2jjINNnrl@hayaku.protocol.zycad.com>, you write...
- >I just didn't want any novices doing 99% water changes, and then wondering why
- >all their fish/inverts were dead within a week do their biological filter
- >bed going south :-).
-
- This has bugged me for quite sometime. How can changing 99% of your water
- kill your filter bed. If this is true, why bother with Wet/Drys, UGFs
- or any sort of filter media. I assume that by using biological filters,
- you are providing a bed for biological bacteria growth. If all the bacteria
- was in the water, UV would kill it, ozone would kill it, etc. I thought
- you can change all your water as long as the bio-filter is kept wet, the
- new water is similar to the old in composition (pH, temp, hardness, etc.),
- and great care is taken to shock the specimens as little as possible.
- Although I understand that there is bacteria in the water (and everywhere
- else for that matter), I would think that it would be mostly concentrated
- in the bio-filter.
-
- I thought that when someone changed 99% of the water, they usually messed
- up by also cleaning out their filters. In this case, of course you would
- have a wipe out. I've cycled tanks with a "dirty" sponge and none of the
- old water with much success. Of course, you need some time for the
- bacteria to adjust to the new load.
-
- Although, I don't think a 99% water change is the best idea, I think you
- can do it under severe circumstances as long as your very careful. But,
- that's just my opinion.
-
- Roberto
-
- P.S. I have done 99% water change without wiping out the tank. But I don't
- advise it in a non-established tank or as common practice.
-