Kh and gh.. I'm doomed to fail?
I am looking to start a tropical community fish tank. I just set up my 75g tank and I am about to cycle it. When I was buying up gear I got a test kit for GH and KH. I tested my tap water and found that KH was at 10 and gh is 16. My ph is at 7.6.
I have a 20g community tank, it was my starter tank and all I ever got for it was very hardy fish. But with this new tank I am going to get fish that from what I have read need closer attention to water perimeters. I would give you a list of fish but I am still in the planing stage. But from what I have read with really hard water my selection of fish is limited.
So my questions are..
how hard is it to prep RO water from the local pet store for a tropical tank?
Or can I add some thing like peat moss or drift wood with carbon to help keep the water clear.
Or do nothing because I have read in some topics that unless you are breeding and as long as PH is stable these things are not as important as some web sites make it out to be.
I concur with Gwen. Assuming those numbers are dGH and dKH (and not ppm), that is fairly hard water. If you check through our fish profiles (second tab from the left in the blue bar across the top), hardness and pH ranges are given for each species. Where this is critical, it will say so. Generally, wild caught fish must be provided with parameters reasonably close to their preferences, while commercially-raised fish can be more adaptable, though this also varies with the species.
You can read more about the co-relation between hardness and pH, and some ways to safely and naturally soften/lower it, in this article:
your water would be great for livebearers, but not so good for angels or other south american cichlids. just look through the profiles like Byron said and you will find plenty that will work. and don't feel too bad, my tap water has a pH of 8.4. that is a lot harder to work with.
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