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- From: howardr@col.hp.com (Howard Rebel)
- Newsgroups: rec.aquaria,alt.aquaria
- Subject: Re: (F) Advices and opinions sought
- Date: 26 Dec 1992 17:59:11 GMT
- Organization: HP Colorado Springs Division
- Lines: 45
- Distribution: usa
- Message-ID: <1hi6hfINNb9h@hp-col.col.hp.com>
- References: <1992Dec26.035724.15017@magnus.acs.ohio-state.edu>
- NNTP-Posting-Host: hplsdum.col.hp.com
-
- abilenko@magnus.acs.ohio-state.edu (Arkady Bilenko) writes:
- > Dear Netters,
- >...
- > I realize that upon converting my tank to an RUGF, I will need a mecha-
- > nical filter. While looking through the "Pet Warehouse" catalog, I spotted
- > something called the "Quick Filter" by Hagen. It providec mechanical filtra-
- > tion and requires a powerhead. I was wondering whether I could use that
- > instead of that big black sponge as a prefilter, or should I buy a second
- > powerhead.
- > Another option I have is purchasing a powerfilter to provide additional
- > biological as well as mechanical filtration. The two filters I am considering
- > are Penguin 160 (with biowheel) or Aquaclear 200. Which would you prefer and
- > why?
-
- An UFG or RFUGF provide a very large bio filter and there is no need
- for additional BIO filtration. All you need for a mechanical filter is
- a sponge on the INPUT of the powerhead you use to pump the water under the
- filter plate. Since the sponge are acting ONLY as mechanical filters you can
- clean them in tap water. This is much quicker if the sponge is in the
- open.
-
- The question you should be asking is how do you get the flow through the
- plate and gravel bed to work properly. While a RFUGF does not have to
- be perfect (whatever that means) I do have a few tips that may help you
- with you project.
-
- If you have too little flow dead spots will develope where no water flows
- through the gravel bed. You can 1: use more or bigger powerheads or
- 2: replace some of the gravel covering the bed with flat rock(s), Either
- method will increase the water flow rate through the gravel.
-
- Some filter plates do not provide enough space underneath them tho
- allow the water to flow away from the input (lift tube). This results
- in a high pressure area near the lift tube and a large amount of the water
- exiting the plate near the inlet. Increasing the size of the cavity
- under the plate will do away with the high pressure zone.
-
- Do not get carried away with the depth of the gavel over the filter plate.
- Too much gravel just adds additional resistance to the water tring to
- flow through it.
-
-
- --
- Howard Rebel hpcsos.col.hp.com
-
-