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Old 03-23-2006, 09:53 PM
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The only reason I think it should not be done is that you will have to acclimatize ALL of your livestock to the new water's parameters. If you have the time and extra water to acclimate your livestock, I'd say go for it.
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Old 03-23-2006, 10:02 PM
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Just to let you know this is a fish only tank with nothing in it right now, but by the time I get my RO up and running there will be at least two fish in it.

No to sure if this makes a difference.

Thanks,

Eric
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Old 03-23-2006, 10:09 PM
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It does make a difference, just go ahead and do the 100% water change then if this is not an established system.
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Old 03-23-2006, 10:10 PM
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Wait until you get the RO running, make the 100% water switch, then add the fish. That's the way I'd do it, anyway.
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Old 03-23-2006, 10:12 PM
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Yeppers.
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Old 03-23-2006, 10:54 PM
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I have done 4 or 5 100% changes now (when I moved the tank or tore it down.) if you match your new water to your old waters peramiters then they shouldn't be any problem.. but if all you are doing is switching to RO water and that is the only reason why put your self through all that work.. do a 50% every week for a couple months (sounds like more work to me actualy ) ya go with the 100% and match the Alk, PH, salinity and temp to your old water and go for it.

Steve
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Old 03-23-2006, 11:33 PM
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A fish-only tank with no fish?

Is the water foul? If not ... is there really a need for the water changeover?

I guess I'm more of the philosophy of "If it aint broke don't fix it". Unless you knew the water had issues, I'd be inclined to just start using RO as the top off and make future water changes with the RO, but wouldn't see a need to do a 100% changeout just because I was switching to RO.

Not knocking the 100% change though .. sometimes it's necessary.. But in this case I wouldn't automatically guess it would be necessary unless there are other factors to consider.
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Old 03-23-2006, 11:56 PM
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Something doesn't jive here.
In one sentence you say you want to move everything to a QT tank.
In another sentence you say there is nothing in the tank.
Which is it?
If the "everything" you refer to moving is Live Rock and/or Live Sand and you plan on moving it back after the water change, then I would do a 50% water change....but then....why move "everything" in the first place?

Just some thoughts.

Cheers,
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Old 03-24-2006, 04:11 AM
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I will just do a 50% change when I get my RO system on-line.

Sorry for not being clear I will have fish before I get the RO system, also I had fish in the tank last week.

Thanks,

Eric

Last edited by Deathstar; 03-24-2006 at 04:16 AM.
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