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AW: changing water . . .

Hi Daniel,

you are right that there are more end products building up in the aquarium.
I suppose though that next to all of those end products can be filtrated out
by bacteria: In Germany the main of the water recycling of the water
companies works through bacterial filtering. They get out almost anything
with this. The trick they use is huge anaerobic masses of decomposing
detritus mud through which the water flows slowly. After that, the water is
oxygened again and particle filtered.

The point is they get out almost any substances with that method, even soaps
and detergents. An anaerobic filters uses the same principle at smaller

This time I have tested the water Nitrates and Phosphates before switching
the filter on. I am going to test again every week and see what are the
changes. I hope that also the phosphates get reduced. (They do in the
municipal water recycling).

One of the visible parameters of high level of disolved organic wastes is
how clear the water is. I have such a chep test which consist simply of a
stripe of platified paper with one side white and the other side very
slightly yellow. If you put it into high waste water you wont make the
difference in coulour. Even a better test is to take a white bucket and fill
it with tank water. On the other side you take another white bucket and fill
it with RO water. You see a clear difference in water having high levels of
organic wastes dissolved. The RO water is simply clear, and the other is

This of course is for high levels of wastes. Yet If I run my tank 3 months
without water change but with this nitrate filter, provided the filter only
handles the nitrates, the water should be yellowish.

It is just a test, and 3 months without change in a 120 Gal tank with plants
and not too much fish but a working nitrate filter is not much. I will see
and since I test the parameters each week, I run no danger of poisoning the

By the way, when you have a running tank of this size, it is almost
impossible to break down the ecological system to a point that you can
measure nitrit or amoniac. Even repeated bacterial treatments never ever
broke my filtering bacterial system to a point that I could measure any
nitrit or amoniac.

Bye, Erik

> -----Ursprüngliche Nachricht-----
> Von: owner-killietalk at aka_org [mailto:owner-killietalk at aka_org]Im
> Auftrag von Daniel McMonigle
> Gesendet: Montag, 22. Juli 2002 08:52
> An: killietalk at aka_org
> Betreff: Re: changing water . . .
> Nitrate is not the only "end product" building up in the
> aquarium. Instead it's an indicator. It's cheap, easy, and
> dependable to test for nitrate. When nitrate is high, other
> dissolved organic wastes are also high, ones that would be
> difficult and expensive to test for. I have used denitrating
> blocks in aquariums and they certainly work. Also the need for
> water changes is tremendously reduced. Since a nitrate test no
> longer works to tell you when a water change or more filtration
> is needed, you have to observe growth and behavior of the fish
> for clues to the water quality condition.
> ----- Original Message -----
> From: Erik Pfingstner
> Sent: Sunday, July 21, 2002 9:50 PM
> To: killietalk at aka_org
> Subject: AW: changing water . . .
> Ha! Here you get some coliding data:
> I have been reading opinions in the oposite direction: change
> water the less
> possible! myself I am basically used to big tanks. For my 450 Liters (120
> Gal) tank I have constructed a nitrate filter. I had it run during nearly
> one year and despite changing water very seldomly, I never could
> measure any
> nitrates at all. I never measured phosphates but having no algae at all, I
> did not bother.
> The filter went untight some time ago and I constructed another one. I put
> it in use on wensday and had 30 mg/l nitrates and 0.25 mg/l phosphates at
> that time. I bet that in 4-6 weeks, I will have zero nitrates without
> changing any water.
> After reading the mail of barry where he  describes shortly his filter
> system, I got the idea of combining his system with mine. Barry
> wrote: "Each
> of my racks has about 100 gals of water in the tanks. Under each rack is a
> sump holding about 50 gals, with a recirculating system on each
> rack." Well,
> you could put such a 10 gal nitrate filter filtering the water in the sump
> and that would be it. I assume it would reduce a lot the needed water
> changes.
> Think of it, in nature most killies live in small ponds and water wholes.
> They get fresh water only when it rains and that is extremely soft water -
> that's it!
> Erik
> > -----Ursprüngliche Nachricht-----
> > Von: owner-killietalk at aka_org [mailto:owner-killietalk at aka_org]Im
> > Auftrag von Charles n Sue Harrison
> > Gesendet: Sonntag, 21. Juli 2002 20:39
> > An: killietalk at aka_org
> > Betreff: changing water . . .
> >
> >
> > When changing water one needs to remember: Nothing works as good as
> > flushing the commode. and
> >
> >   Change as much of your water as often as you can.
> >
> >   I try to syphon off as much water out of each tank as I can and then
> > fill with changing water. I would like to use the water outside in
> > the lawn or flower beds. That is something I could work on. (Carrying
> > buckets, no I don't think so.) One can never get back to the water
> > quality one started with except by exchanging all of the stuff in the
> > commode. I learned this from talking to Ed Warner and watching him in
> > his fish room.
> > Clean water = healthy fry, this was and continues to be their
> > equation and mine as well. Leaving behind a fraction of the previous
> > tank water leaves behind the fractional waste as well. Over time it
> > continues to build and continues to alter the environment.
> >
> > If one does this regularly there is no problem with shocks. But it
> > does take attention to the fish room.
> >
> > Changing water for me is pumped into the tanks with a submersible
> > pump from a 55 gal plastic drum of thiosulfate treated temperature
> > controlled water. In Texas in the summer months, hot water comes out
> > of both taps. I had a greater problem of controlling the temperature
> > in Ft Worth than anything else.
> >
> > More water changes - - -
> > --
> > InkForYourPrinter.com
> > Laser and Ink Jet Cartridge Recycling in the USA!
> > We pay money for empty printer cartridges.
> >   http://www.inkmkr.com/BuyBackCart.html
> >
> > ---------------
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