Adding nitrates without adding Ca, Mg or K

Richard Sexton wrote:
In article ,
Philippe Lemaire \(remove oldies\) wrote:
Richard Sexton wrote:

It shouldn't. Where were you ading potassium.

If you chnage half he water once a week it'll take care of any
imbalances although you may need ot make two 80% water changes
to get rid of any current exess wastes (like too much K).

If you think it doesnt come from the substrate, it shall come from the
trace mix...

There is literally only a trace of potassium in iron/trace mix.

So lot of it was trapped in the substrate ??
Or is ProFito different ???

Philippe

If you think it doesnt come from the substrate, it shall come from the
trace mix...

There is literally only a trace of potassium in iron/trace mix.

So lot of it was trapped in the substrate ??
Or is ProFito different ???

I assume ProFito is a substrate material? No substrate should leak
potassium intothe water anything that would is far too unstable
to be ever used in a fishtank.

Okay, now say your tank holds 40 liters. You take out all the water
that you can. About 30 liters. There's still 10L in the substrate.

So, when you add more water all the crap in solution in the water
in the substrate now comes back into the tank water, EVEN IF YOU
REPLACED ALL OF IT. Now, if you have something in yout gravel
that is leaking potassium into the water column that woiuld doit
too. Did you ever use any plant fertilizer tabs in that gravel?


--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

Richard Sexton wrote:
If you think it doesnt come from the substrate, it shall come from the
trace mix...

There is literally only a trace of potassium in iron/trace mix.

So lot of it was trapped in the substrate ??
Or is ProFito different ???

I assume ProFito is a substrate material? No substrate should leak
potassium intothe water anything that would is far too unstable
to be ever used in a fishtank.

It is a liquid fertiliser...


Okay, now say your tank holds 40 liters. You take out all the water
that you can. About 30 liters. There's still 10L in the substrate.

So after 2 years, even if the tank water was once with 2000 mg/l
of potassium, the leakage shall be ended now...


So, when you add more water all the crap in solution in the water
in the substrate now comes back into the tank water, EVEN IF YOU
REPLACED ALL OF IT. Now, if you have something in yout gravel
that is leaking potassium into the water column that woiuld doit
too. Did you ever use any plant fertilizer tabs in that gravel?

I'm afraid yes :-(
I'm back at 3 per week from 10 last year...

Thanks for all !

Philippe

too. Did you ever use any plant fertilizer tabs in that gravel?

I'm afraid yes :-(
I'm back at 3 per week from 10 last year...

Thanks for all !

Ah. That'll do it. You might want to remove as much of the gravel as
you can and replace it with clean gravel. A diatom filter would be
handy.

--
Need Mercedes parts ? - http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home page: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net

Richard Sexton wrote:
too. Did you ever use any plant fertilizer tabs in that gravel?

I'm afraid yes :-(
I'm back at 3 per week from 10 last year...

Thanks for all !

Ah. That'll do it. You might want to remove as much of the gravel as
you can and replace it with clean gravel. A diatom filter would be
handy.

Going this way from now !

Philippe