Hey guys. Recently I've been researching what my fish like to live in water hardness wise. Here's what I've found..
First number is dGH from Baensch Aquarium Atlas Volume 1, second is GH
from the API GH
test kit, and third is a KH
suggestion from live aquaria.
- Guppies: 10-30, 4-8, 10-30(KH)
- Zebra Danios: <30, 4-8, 8-12(KH)
- Bloodfins: <30, 4-8, ?
- Betta: <25, 4-8, 0-25(KH)
First off, dGH is just degrees GH
aka degrees of hardness? It's just weird cause it says 10-30į dGH. So that'd read 10-30 degrees of degrees general hardness? A bit confusing. (Ok wikipedia confirms it's degrees of general hardness, bit of a repeated unit there.)
Ok, so which number should I go by? Also, if you know my tank at all, I have plants, and they don't like really hard water. According to The Atlas, my plants, on average, like a KH
of around 10. (Anywhere from 6 to 15).
I know that GH
are different. GH
(General Hardness) measures Ca2+ and Mg2+ and stuff like that. KH
(carbonate hardness) measures CO32- and it's conjugate, so they are, in fact, two different measurements. Why does live aquaria only give KH
? I've read that when you only get one measurement you should just match the other one to it as well. But in my case that doesn't work, cause my plants don't like really high KH
. Generally, when I read about plants I get KH
and when I read about fish I get GH
. (Of course carbonate decomposes into CO2
eventually, so I can see that point). I'm just a bit confused that's all. I mean I have the ability to make my GH
15 and my KH
10, as those are the average from the Atlas with my fish (GH
) and plants (KH
I was just worried cause in the directions in the API kit, it says 11-20 (GH
) is for marine
fish and inverts. Freshwater fish are from 4-8 and plants are like 2-6 or something like that.
Can somebody set me straight?
And yes, I know, constant water parameters are much better than fluctuating ones. Please, that's not the discussion here.
EDIT: Just found out I don't have a choice regarding adjusting these values. The GH
out of my tap is 1 (water softener doin it's job) and the KH
is 5. So even if I did just add some tap water, it wouldn't nearly bring my GH
to any value that anything (fish or otherwise) would like.