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Re: [APD] Help raising GH from 0!
15 tablets gives 2400 mg, in a 200L that's 2400 / 200 = 12 ppm. 12 / 17.9 =
GH 0.67 d. And 30 tablets would reaise GH by 1.34 deg.
How much is those tablets? You may be better off using Seachem's Equalibrium
to raise the GH, apart from Ca, and Mg, Equalibrium also contain lots of K,
and a bit of Mn and Fe as well, which are usually lacking in very soft
I also get very softwater out of my tap, and I just mix my own equalibrium
equivalent to raise the GH.
Hope this helps.
----- Original Message -----
From: "Laith Arif" <laith at swissonline_ch>
To: <aquatic-plants at actwin_com>
Sent: Tuesday, August 10, 2004 7:36 PM
Subject: [APD] Help raising GH from 0!
> I've been noticing that my tap water KH has gone down drastically over the
> past 6 months; from a high of around 15 to 5 or 6 these days. I usually
> don't measure GH but when I did and got a reading of 0 (actually the color
> changed after 1 drop so it could be between 0 and 1) I thought the GH test
> kit was off.
> Today I spoke to my lfs and they said that the local water supply had
> a lot softer. Also I've noticed that some new leaves, especially on my
> Alternanthera plants, were growing very small and crinkled.
> So, the good news is that I no longer need to use RO water. The not so
> news is that I need to raise the GH of my water...
> My tank currently has a KH of 3.5, GH of 0, pH of 6.6.
> Off I went to the pharmacy and found a Magnesium+Calcium product (produced
> from a "dolomite sand from Norway..."). It comes in the forms of pills,
> of which contains 100mg of Calcium and 60mg of Magnesium. As I didn't want
> to raise the KH, I didn't want to go the Calcium Carbonate (CaCO3) route.
> So, according to my calculations, 15 of these tablets will raise my GH by
> 1.05 (200l aquarium)? This based on 1 GH being 7.14mg/l of Calcium?
> Therefore if I add 30 tablets, that will raise the GH by 2.1 and will add
> 9mg/l of Magnesium.
> Could someone please double check my calculations and I'd also like to
> if that level of Magnesium in the aquarium is ok?
> Many thanks!
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