Hard water and Hi alkalinty FWtank - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 4 Old 07-26-2012, 08:57 PM Thread Starter
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Question Hard water and Hi alkalinty FWtank

I live in apt. The water hardness and alkalinty is off the strip chart.Is this bad and is there any thing I can use to fix this. Will read all reply's.
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post #2 of 4 Old 07-26-2012, 09:00 PM
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Well fish like African cichlids and large rainbowfish enjoy waters like that, so if you have a big tank those are some options where you won't have to mess with it..
Do you know the exact pH, kH and gH?
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post #3 of 4 Old 07-26-2012, 09:12 PM Thread Starter
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Sorry no i dont know exact readings all i have is strip test.29 gal tank .Got 5 guppy2M/3pregoF,2red wag sordtails,1 swortz cat,1zebra angel
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post #4 of 4 Old 07-29-2012, 11:08 AM
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I would find out the numbers for GH (general hardness), KH (carbonate hardness or Alkalinity) and pH from the water supply people; they may have a website, or they can tell you. Knowing the numbers is important.

Assuming it is fairly hard water, the livebearers will be fine. They need medium hard to hard water, and pH above 7.

On the fish mentioned, the zebra angelfish may cause trouble as it matures, eating the guppies. It should be in groups, but there is insufficient space in a 29g for this. Can you return or re-home this fish?

The cory should have company too, a group of 5 is minimum.

We have fish profiles, second tab from the left in the blue bar across the top of the page. Info on this is included in the species profile.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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