New 29g tank - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 13 Old 04-04-2010, 03:48 AM
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Well RO water is basically incredibly soft and usually has around a neutral pH. If you have hard, alkaline water, you can keep fish that come from those types of environments but might have difficulty keeping fish from soft, acidic water (especially sensitive ones). With really soft, neutral water, your pH is naturally going to fall a bit (although this can be helped along with something like peat used in your filter) to achieve very soft, acidic water that would be perfect for keeping certain fish.

If you've already got the RO machine your possibilities are basically endless. I'd have a look at our list of fish profiles here and see what sorts of fish strike your fancy.

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post #12 of 13 Old 04-04-2010, 05:23 PM Thread Starter
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the thing is that i like alot of fish and some of them need lower ph and some need a bit higher ph
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post #13 of 13 Old 04-04-2010, 06:17 PM
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One aspect of a healthy and successful community aquarium is that all the fish have basically the same requirements with respect to water parameters (pH, hardness, temperature) and environment. This ensures that what you provide will be suitable for all the fish and that means less stress which equates with better health long-term. Some fish have wider ranges they can adapt to, other fish are quite confined within narrow or specific parameters. When selecting fish, you check all these things and build the community accordingly.

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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