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Re: NFC: Filterless Tank Experiment: Utter Failure


It sounds like you need more plant mass and a 'dependable' light source.  
Indirect natural light is not usually sufficient for any but a handful of 
plants such as anubias and perhaps java moss and java fern.

The trouble with these plants is that they grow slowly, especially under low 
light, and use relatively less nutrients than will faster-growing, 
light-loving plants.

Your unfiltered ten-gallon tank could probably support your ten small fish, 
but only after the plants are well established and growing.  If you want to 
try again, I'd recommend 40 watts of lighting, double or triple the number 
of plants and start out with only three or four fish.  Feed no more than 
three times a week at first, and then only a little at a time.

It always helps to start out with a fast-growing nutrient mop like floating 
water sprite or hornwort (coon's tail).  These can be removed later, if you 
wish, after the other plants are established.

Over time, if things go well, you could try adding one or two fish at a 

Good luck,


>From: "Chuck Miro" <nativefish at hotmail_com>
>Reply-To: nfc at actwin_com
>To: <nfc at actwin_com>
>Subject: Re: NFC: Filterless Tank Experiment: Utter Failure
>Date: Mon, 21 May 2001 12:20:56 -0400
> > Need more info, Chuck!  Please provide:
> >
> > size of tank: 10g
> > number of fish: five pygmy and five least killies
> > number and type of plants: have a dozen, various
> > amount of and type of light provided: mostly indirect natural light
> >
> > For a filterless tank to work, it helps to observe the following
> > generalities:
> >
> > Light fish load: yep
> > LOTS of plants: maybe I should have had more
> > 2 to 4 watts of light per gallon - better 4 than 2: didn't measure the
>amount of natural lighting
> > Feed the fish lightly: yep

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