From: romanr@bcarhed.bnr.ca (Roman Romaniuk)
Subject: Re: [FILTRATION] Will this work?
Organization: Bell Northern Research Ltd.
	<1992Aug18.132435.13057@walter.bellcore.com>
Date: 18 Aug 92 16:53:54



Personally, I don't think that this setup will work. The first Magnum
has no head to work against, and thus would suck water faster out of
the tank than the second magnum could replace it (unless of course
your wet/dry was part of a sealed system -- not practical). 

|> I have a wet/dry filter and two Magnum 350s. I would like to hook them up
|> as diagramed below. Would this work? Does anyone see any potential problems
|> with this setup? I want to try this as it would allow me to remove the siphon
|> box and pre-filter leaving only an intake/output pair in the aquarium, making
|> it look MUCH nicer.
|> 
|>                       <----                          <----
|>                      ________                       ________
|>                      |      |                       |      |
|>                      |  ----|-----------------------|----  |
|>                      |  |   |                       I   |  |
|>                      |  |   |                           |  |
|>                      |  |   |                           |  |
|>                      |  |   |                           |  |
|>                      |  |   O                           |  |
|>                      |  ---------------------------------  |
|> TOP OF STAND -------|-------------------------------------|----- TOP OF STAND
|>                       \       _____           _____       /
|>                        \      |   |  wet/dry  |   |      /
|>                         \     | --|-----------|-- |     /
|>                          \    | | I           | | |    /
|>                           |   | |             | | |   |
|>                           |   | |             O | |   |
|>                           |   | ----------------- |   |
|>  SHELF -------------------|---|-------------------|---|----------------- SHELF
|>                         --|---|--               --|---|--
|>                         | I   O |               | I   O |
|>                         |       |               |       |
|>                         |       |               |       |
|>                         ---------               ---------
|>  BOTTOM OF STAND --------------------------------------------- BOTTOM OF STAND
|>                       MAGNUM 350 #1           MAGNUM 350 #2
|>                     (CARBON CONTAINER)      (MICRON CARTRIDGE)
|>                    (IN RITE-SIZE SLEEVE)   (IN RITE-SIZE SLEEVE)
|> 
|> 
|> I'd put the micron cartridge in the second Magnum because as it clogged it
|> would cause the water level in the wet/dry to rise. However, this rise would
|> be offset by evaporation, causing the water level to actually remain somewhat
|> stable. If the micron cartridge was in the first Magnum, the water level in
|> the wet/dry would drop as the micron catridge clogged and this drop would
|> actually be speeded by evaporation. This, of course, assumes that the micron
|> cartridge (in it's pre-filter sleeve) will clog faster than the carbon con-
|> tainer (in it's pre-filter sleeve), which seems reasonable.
|> 
|> It occurs to me that if the power wer cut to this setup, that water would
|> siphon from the tank through BOTH Magnums and into the wet/dry (which would
|> overflow, since it sits lower than the aquarium). Right? If so, wouldn't a
|> small hole, just below the water line, in both the intake and output tubes
|> take care of that?
|> 
|> My only other concern is if the output from the first Magnum would be so
|> fast that it would wash all of the bacteria on my (2.5 gallons of) bio-balls
|> away.
|> 
|> I do know that the first Magnum could be on the same level as the wet/dry. I
|> wish the second Magnum could be on the same level as well, but it seems it
|> would need to be lower in order to properly siphon out of the wet/dry.
|> -- 
|>  ******************************************************************************
|>  * Shaun T. Erickson                              Internet: ste@alux2.att.com *
|>  * Cap Gemini America (RV @ AT&T)                    UUCP : ...!att!alux2!ste *
|>  ******************************************************************************
--
Roman Romaniuk			   DMS Test Tools Design
Bell Northern Research Ltd.
Work: (613) 763-9678       	   BNR may or may not 
ESN: 393-9678			   share my opinions.
Newsgroups: rec.aquaria