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Re: Was PMDD now CSM


Thank you, that information will probably save me a refill for my Fe test
kit <g>.

One (OK, 2) other questions - When you say you add X amt. of CSM, is that
quantity CSM + B only or do you mix the CSM with MgSo4 and add X amt. of
that.  I ask because it seems the grain size of the Epsom salt is large
enough that CSM quantity might vary in a unpredictable way if premixed.  The
second question - it seems that the CSM does not dissolve readily.  If it is
just put into the aquarium without disolving in water first what is
happening to it?  Does it fall to the bottom and then dissolve into the
water column?  Or does some of it not dissolve?

I have a old measuring scoop, maybe from a Seachem Fe test, that I am
guessing is about 0.2 grams and that maybe 2 - 3 of these scoops of CSM will
be about right.  Will test as I go.


> Date: Tue, 26 Mar 2002 18:11:56 -0600
> From: "Tom Wood" <tomwood2 at flash_net>
> Subject: Re: PMDD
> Jay wrote thusly:
> "Jason Luebke sent me his usage pattern as a reference - for 150 gallons
> tanks 1/4 t. CSM per feeding."
> I have a 90 gallon tank and add about 1/10 teaspoon per day of the dry
> powder directly to the tank. The iron level barely shows up on a Seachem
> test kit, which is about right. I run a UV 24/7 and change 20% of the
> weekly.
> "Needless to say, huge difference.  Am I missing something here?"
> Probably not. If all you are making is a solution of CSM+B, that's not
> really PMDD, strictly speaking. Add as much as you need to get a reading
> "some" on a reliable test kit, and you will be close enough. For a better
> calculation of the N and K parts of fertilizing, go to:
> http://www.csd.net/~cgadd/aqua/art_plant_dosage_calc.htm
> I experimented with the CSM+B and KNO3 until I knew how much to add for Fe
> and N respectively. I think the Mullins PMDD formula underdoses K when
> compared to the Gadd calculator and to most other conventional wisdom
> regarding K. Who is right? Who knows, but it doesn't matter much since K
> be overdosed without apparent negative effect.
> "I feel a little sheepish asking this after reading James and Karens
> comments
> in the archives about folks who don't know what they are doing staying
> from this stuff.  Or something to that effect."
> We have noted James' and Karens' counter-revolutionary rhetoric, and will
> act accordingly when the time comes.  (Insert smiley face, big grin,
> whatever else necessary to convey the joke. Sheesh.)
> TW