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  1. flocculents and fish
    by Wright Huntley <huntley1/> (Thu, 07 Jan 1999)
  2. Flocculents for Green Water
    by krandall/ (Thu, 07 Jan 1999)

flocculents and fish

by Wright Huntley <huntley1/>
Date: Thu, 07 Jan 1999

> Date: Thu, 07 Jan 1999 09:17:37 -0800
> From: Roxanne Bittman <>
> Subject: flocculents and fish


> Do you more fish-oriented types know why these
> flocculents seem to have this bad effect?  Are the
> flocculated particles clogging their gills?  

IMHO, flocculants (and their cousin, silica gel, as used in table salt)
can be very hard on some high-respiration-rate fish. I think they do
coat the gills, and perhaps clog the digestive system.


- -- 
Wright Huntley, Fremont CA, USA, 510 494-8679  huntley1 at home dot com

Liberalism is totalitarianism with a human face.
                                  Thomas Sowell

Flocculents for Green Water

by krandall/
Date: Thu, 07 Jan 1999

>I have also, several times (but never more than twice
>a week), tried flocculents.  At first, I used Kent's Pro
>Clear, but switched to Crystal Clear (Aquarium
>The thing is, both seem to stress the fish, especially
>the tetras.  I have lost 3 Megalamphodeus roseus so
>far, as well as about 10 Paracheirodon simulans
>(green neons).  The latter are known to be "sensitive"
>although the literature (Baensch) says they don't like
>high nitrate; it says nothing about flocculents.

I've been leery about the use of flocculent agents since the one time I
used one, in my very early days of adult fish keeping.  I used it according
to the directions on the bottle, and within minutes two dozen blue tetras
(another fish considered "sensitive") were dead.  I don't remember if I
lost anyhting else, or even whether other fish looked stressed.  I just
remember losing my whole beautiful school of blues.  I never dared try it
again.  Fortunately, I learned how to manage my tanks better in the early
stages and have not really needed it either.<g>  

Karen Randall
Aquatic Gardeners Association

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