01-08-2013, 04:15 PM
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Originally Posted by Sookielee
Well I hope the "yeah" is in order.
I tested our tap water after letting it run a few minutes.
GH = 24
KH = 13
PH = 7.4 (according to water dept.)
So folks, I know that the 24 is hard water and we need to select fish accordingly, but what does the KH tell me about the fish I can safely keep?
Welcome to the hardwater world.
The GH is the important one as that gives a good idea of how hard the water is overall. The KH has to do with the buffering capability of the water with regards to pH stability... I won't get all chemical here.
I had a 23 dGH and a 24dKH (or so) and I had to be very selective with fish choices assuming that the water was going to stay that way or I was willing to modify my water a lot. I did cut it with reverse osmosis water once (5 gallons of the 37 total) and it did bring the H's down but I also planted lots of live plants and I found that those brought it down even more. I am now in the mid teens. You've got the same problem as I even though your KH is almost half mine. so I would suggest trying plants and see what they do for you then go with small water changes, add some RO if you find it necessary.
Choosing harder water fish would be prudent, but perhaps not necessary if you are willing to play with plants and wait it out for the water to stabilize.