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- Path: sparky!uunet!spool.mu.edu!sdd.hp.com!col.hp.com!howardr
- From: howardr@col.hp.com (Howard Rebel)
- Newsgroups: rec.aquaria
- Subject: Re: [F] a few questions...
- Date: 21 Dec 1992 17:32:56 GMT
- Organization: HP Colorado Springs Division
- Lines: 52
- Message-ID: <1h4v48INNlfo@hp-col.col.hp.com>
- References: <1h4p9pINNmd7@introl.introl.com>
- NNTP-Posting-Host: hplsdum.col.hp.com
-
- I agree with what Pete has stated in that the mechanical filter should be
- first. I would like to add that many multi stage filters sold today have (1)
- mechanical stages that allow some solids to pass through and (2) bio filters
- that catch some of the solids passed by the mechanical stage. Because of
- this you will need to clean both the machanical and the bio stages of these
- filters.
-
- To some extent you can conclude that many multi stage filters are a waste
- of time and money. If both/all stages act as mechanical-bio filters then
- why bother with different types of media for the bio section. You may as
- well just toss in another sponge and, as pointed out by Pete, alternate
- cleaning them. In general if any mechanical media is followed by a
- sponge just forget the mechanical media and let the sponge do the job
- of both since it will in any case. This in fact may be a preferable setup
- in that sponge will not be allowed to collect small amounts of solids over
- a long period of time and then drop the pH when you least suspect it (after
- all it looks clean, is not blocked. and is protected by that mechanical
- filter).
-
- If you use bio media (method) that will not trap/collect solids you will
- never have to clean it. In this case the multi stage concept works and
- the advantage is that you never have to disrupt the bacteria in the bio
- stage.
-
- (and backing off just a bit)
- Some filters such as good trickle filters fall somewhat short of ideal
- but are quite usable with infrequent bio media cleaning.
-
- Chemical filtration aimed at products that are normaly handled by the
- bio filter may be disruptive to the bio filter.
-
- pete@introl.com (Pete Ikusz) writes:
- >...
- > They also contend that the noodles were put at the lowest level to act as a
- > coarse mechanical filtering stage. However, they act more as a bio filtering stage.
- > And that bio filtering should be done after mechanical filtering has been
- > done. (IE: there is no reason to put them there. It only makes cleaning
- > more difficult.)
- >
- > If I go by what I see, then their methodology looks 100% correct, at least all
- > their fish seem happy. (I have seen 10 out of the 60 different tanks that they
- > care for.)
- >
- > Any netters have different or similar opinions?
- >
- > -Pete
- > --
- > -------------------------------------------------------
- > Pete Ikusz Introl Corporation pete@introl.com
- --
- Howard Rebel hpcsos.col.hp.com
-
-