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- Path: sparky!uunet!think.com!linus!agate!usenet.ins.cwru.edu!po.CWRU.Edu!fxm3
- From: fxm3@po.CWRU.Edu (Frank Mularo)
- Newsgroups: rec.aquaria
- Subject: Re: (M) How often to change water?
- Date: 27 Jan 1993 17:32:29 GMT
- Organization: Case Western Reserve University, Cleveland, Ohio (USA)
- Lines: 38
- Message-ID: <1k6gvdINN9so@usenet.INS.CWRU.Edu>
- NNTP-Posting-Host: slc12.ins.cwru.edu
-
-
- I am a computer illiterate, so I can't pull quotes from other's
- posts, but I felt a need to answer this marine water change sub-
- ject.Bryan Milligan states that he doesn't change water in his
- tanks and after six months, everything is ok. My experience is
- that water changes are essential to a marine tank's well-being.
- Granted, many people feel that a tank with live rock can be bal-
- anced enough between reduction of ammonia to nitrite to nitrate
- and denitrification so that nitrate does not build up, so there
- is no need for water changes. However, I would be willing to bet
- that the majority of marine tanks out there have no live rock at
- all, and water changes would be the only way of keeping nitrate
- levels low. Also, given the tendency of most fishkeepers (well,
- my tendency, anyway) to overfeed, water changes are the best way
- to keep the tank clean and free of detritus, so that phosphate
- and nitrate don't rapidly build up and contribute to bad water
- guality and undesirable algae. Water changes are the best way to
- replace trace elements, as well as maintaining a good buffering
- capacity. I think that many marine fishkeepers feel that if the
- nitrate level is not building up, a water change is not necessary.
- However, nitrate is not the only compound that builds up in a
- marine tank. Phosphates, acids, phenols, and many other compounds
- can build up in a marine tank, and if they are not removed or re-
- duced by water changes,can adversely affect water quality and
- fish or invert health. Our protein skimmers, polyfilters and ac-
- tivated carbon can only remove so many things from the tank, they
- are not 100% efficient. I have seen a tendency of marine fish-
- keepers to dump tons of chemicals into a tank to maintain a cer-
- tain buffering capacity, an exact pH, or whatever. A marine tank
- is not a science experiment. There are living creatures in them
- to which we are obliged to provide a quality existence. For them,
- the least stressful way to do that is to feed well, keep our tanks
- at the right temperature, and do regular partial water changes.
- My 70 gallon tank and my 55 gallon tank get 15% water changes
- every two weeks and everything thrives in them.
- I yield my soapbox to someone else.
-
- Frank Mularo CWRU Cleveland Oh.
-