Re: PMDD ingredients, high nitrates
To: Aquatic-Plants at actwin_com
Subject: Re: PMDD ingredients, high nitrates
From: psears at NRCan_gc.ca (Paul Sears)
Date: Tue, 22 Oct 1996 09:20:05 -0400 (EDT)
In-Reply-To: <199610211939.PAA27145 at looney_actwin.com> from "Aquatic-Plants-Owner at ActWin_com" at Oct 21, 96 03:39:05 pm
> From: James Wong <u2120863 at acsusun_acsu.unsw.edu.au>
> Subject: PMDD ingredients
> I've found some trace elements mix but its constituted somewhat differently
> from that which is recommended. It made by an Australian company named
> Manutec. Its listed below:
> Sulfur as sulphate 6.29%
> Calcium as calcium carbonate 10%
> Magnesium as magnesium sulphate 3.62%
> Maganese as maganese sulphate 2.88%
> Iron as iron chelate 2.73%
> Copper as copper sulfate 1.25%
> Zinc as zinc sulfate 1.00%
> Boron as sodium borate 0.09%
> Molybendium as sodium molybate 0.0038%
> I would like anyone's opinion on whether this would work in the PMDD.
> >From what little I know I assume I would need to add magnesium and maybe
> some iron. Also the high level of copper worries me, and the calcium
> carbonate is going to mess up the hardness some.
I would draw the same conclusions, but the CaCO3 is not going
to be a significant problem if you do a water change once in a while; the
amounts you add are pretty small compared with the calcium in even
fairly soft water. The same applies to the rise in bicarbonate concentration
that will result.
> Secondly, I've come across this stuff called Sulfate of Potash for $6
> a kilo at my local K-mart. Is this the same stuff as potassium sulfate
> and will this stuff work?
Yes on both counts; they are using an archaic name for it. K-mart
has spread to Australia, then? Maybe it started there. :)
Make sure there isn't anything else in it - there shouldn't be.
> Also, have any of you out there being using PMDD with no CO2 injection
Yes, in a 35 L tank with guppies and a pH of about 7.8. The
lighting is poor, but the plants grow and I can't see any algae in there.
> From: JOlson8590 at aol_com
> Subject: High Nitrates
> (2) Say your fish load in a tank emits only 5 ppm of nitrates a day. (a
> rather small amount - fish are responsible for almost all of the Ammonia,
> Nitrite, and Nitrate in Coral Reef environments. Fish give off a LOT of
> waste materials which your filters busily convert to Nitrates.)
I don't think 5 ppm/day is a small amount. Fish food will have
only a few % of nitrogen in it, and to add that much nitrate to my 150L
tank, I would have to feed several grams of food. Until I added nitrate
to my tank, I always had undetectable nitrate in there, because the plants
grabbed all the nitrogen available. My tap water nitrate is also undetectable;
this is _not_ the case everywhere!
Paul Sears Ottawa, Canada
Finger ap626 at freenet_carleton.ca for PGP public key.