What water should I get?- my tap water is way too hard - Tropical Fish Keeping - Aquarium fish care and resources

 
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post #1 of 7 Old 04-10-2010, 04:48 PM Thread Starter
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What water should I get?- my tap water is way too hard

The store sells reverse osmosis and de-ionized water. I'm thinking reverse osmosis would be best. What you you think? I'm not going to use it to fill the whole tank, but I'm going to mix it a little at a time.
My tap water's pH is >8.4, hardness is like 300, alkalinity is 240

My boyfriend, observing my guppy tank:
"Someone should write a book about guppies called 'Everyone Poops. And Then Everyone Tries to Eat the Poop Because They Think It's Food.'"
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post #2 of 7 Old 04-11-2010, 03:11 AM
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What fish are you trying to keep? In any case if you're going to start using RO water, you'll want to make the change gradual so as to not shock your fish. Even once you've completely switched over, I would still include some of your tap water in your mix as RO water is going to essentially have zero hardness, which means it'll be lacking in essential minerals your fish (and plants, if you have them) need and will be prone to large pH swings. But yes, between those two options you definitely want the RO water rather than just plain DI (although sometimes they sell water that's both).

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post #3 of 7 Old 04-11-2010, 08:19 AM
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Well... do you have fish in the tank with that hard water already? If so, I agree with batman above but if not, why mix at all? Just go with the RO from the get go and use only that to fill the tank... and to do water changes.
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post #4 of 7 Old 04-11-2010, 01:37 PM Thread Starter
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Yeah, like I said, I'm not going to add it all at once, just a little at a time. And I'm still going to keep mostly tap water. Maybe I shouldn't because my fish have been doing fine.

My boyfriend, observing my guppy tank:
"Someone should write a book about guppies called 'Everyone Poops. And Then Everyone Tries to Eat the Poop Because They Think It's Food.'"
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post #5 of 7 Old 04-11-2010, 05:59 PM
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Until you tell us the species of fish you have we can't offer much advice. If you have soft water fish, depending upon what they are, they may look OK now but be suffering internally and coming to an earlier demise than otherwise. On the other hand, if they are suited to your water they may be fine as is. There are several soft water fish that will do OK in harder water, and there are some that will not.

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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post #6 of 7 Old 04-11-2010, 06:35 PM Thread Starter
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Dwarf Gouramis, guppies, T-bone rasboras, kuhli loaches, bristlenose pleco, ghost shrimp

My boyfriend, observing my guppy tank:
"Someone should write a book about guppies called 'Everyone Poops. And Then Everyone Tries to Eat the Poop Because They Think It's Food.'"
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post #7 of 7 Old 04-11-2010, 07:49 PM
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The rasbora, gourami and kuhli loach are soft water fish, the others are probalby fine.

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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