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Re: Nitrates & sludge problem
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To: Aquatic-Plants at actwin_com
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Subject: Re: Nitrates & sludge problem
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From: stevensj at calshp_cals.wisc.edu
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Date: Thu, 17 Aug 95 10:59:40 CDT
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In-Reply-To: <199508170739.DAA12254 at looney_actwin.com>; from "Aquatic-Plants-Owner at actwin_com" at Aug 17, 95 3:39 am
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Mailer: Elm [revision: 70.85.2.1]
> From: Stephen.Pushak at hcsd_hac.com
> Date: Wed, 16 Aug 95 13:05:48 PDT
> Subject: Re: Nitrate deficiency
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> Joanne wrote:
> >
> > I've been noticing that every time my nitrates get down to zero in my
> > planted tanks I get a yucky brown slimy sludge growing. I'd like to
> > know if anyone else has encountered this.
>
> These are diatoms I suspect. Odd however if you have plenty of light
> and catfish to stir up the bottom and good water circulation to keep
> detritus from accumulating too much on the bottom. Perhaps it is
> uneaten food and fish poop? I don't know if it is right to associate
> zero nitrates with this.
Well, actually these tanks don't have the greatest circulation. The
worst affected is my 25 gallon tank which only has two aquaclear 150
powerfilters on it & these keep getting clogged up with this slimey
sludge stuff. This tank does not have any catfish in it at the moment
but I keep intending to get some for it. The sludgey stuff grows on
plants (particularly near the base) and inside the filters a lot (in
the foam & inside the filter & intake tubes).
I'm pretty convinced it grows more when nitrates are zero - maybe it's
just a decomposition product from dying plants when nitrates get
limiting. The pH is 7.2, CO2 15-20 ppm (DIY sugar + yeast), GH 5, temp
82 deg F and lighting: 3 18" bulbs (1 coralife full spectrum, 1 coralife
50/50 and 1 vitalite).
I will just try keeping nitrates > 0 & see if that helps (& buy some
catfish soon).
Joanne.
P.S. I will be gone all next week at a conference just in case people
try to contact me & can't.
P.P.S. I have been using a Tetra kit for KH & it just ran out. Anybody
got any suggestions for a different brand or stick with the same?