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Old 06-19-2004, 04:50 PM   #1
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Finally filling tank - quick question!

OK, I am finally ready to add the water. I've got my hydrometer, salt mix and a whole lot of R/O water. The problem is, I don't know how much salt to add per gallon to get to the correct salinity (1.021 right?).

Could someone give me just a ballpark amount that will get me close enough to begin tweaking so that I don't have to check over and over again.

TIA.
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Old 06-19-2004, 05:05 PM   #2
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it should say on the salt tub how much to add, on average. they hydrometer's the only real way...and keep in mind it's calibrated for something like 65 degrees, so you have to adjust (should be able to find a formula easily enough)
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Old 06-19-2004, 05:49 PM   #3
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Re: Finally filling tank - quick question!

Quote:
Originally Posted by saberry
The problem is, I don't know how much salt to add per gallon to get to the correct salinity (1.021 right?).
Start with about 1 cup per gallon and adjust accordingly after it's mixed for an hour or so with a powerhead and heater. Once the temp is up to approx 80° target an SG or 1.024-25 (35ppt). An SG of 1.021 is too low.

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Old 06-19-2004, 05:51 PM   #4
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Re: Finally filling tank - quick question!

Quote:
Originally Posted by steve-s
Quote:
Originally Posted by saberry
The problem is, I don't know how much salt to add per gallon to get to the correct salinity (1.021 right?).
Start with about 1 cup per gallon and adjust accordingly after it's mixed for an hour or so with a powerhead and heater. Once the temp is up to approx 80° target an SG or 1.024-25 (35ppt). An SG of 1.021 is too low.

Cheers
Steve
Thanks, is 1.021 too low for fish only?
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Old 06-19-2004, 06:04 PM   #5
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Re: Finally filling tank - quick question!

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Thanks, is 1.021 too low for fish only?
1.021 is too low for anything. Lower salinities as a permanent living environment can negatively affect the health of the fish eventually. If you are doing this for the control of parasites, don't. It does absolutely no good.

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Old 06-19-2004, 06:27 PM   #6
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Re: Finally filling tank - quick question!

Quote:
Originally Posted by steve-s
Quote:
Originally Posted by saberry
Thanks, is 1.021 too low for fish only?
1.021 is too low for anything. Lower salinities as a permanent living environment can negatively affect the health of the fish eventually. If you are doing this for the control of parasites, don't. It does absolutely no good.

Cheers
Steve
1.024 it is. Thanks.
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Old 06-19-2004, 07:52 PM   #7
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Is there any particular reason an aquarium needs a higher SG? Isn't NSW closer to 1.021 than 1.025?
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Old 06-19-2004, 09:17 PM   #8
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it should say on the salt tub how much to add, on average. they hydrometer's the only real way...and keep in mind it's calibrated for something like 65 degrees, so you have to adjust (should be able to find a formula easily enough)
Actually it does not give an amount on the bucket. It is the Kent brand. The Oceanic, IO both say 1/2 cup per gallon. The Red Sea brand was something like 1/4 lb. per gallon - who wants to weigh

The Kent that I had, came with the aquarium from the previous owner. Unfortunatley, there was not enough to finish the job so I picked up some IO. I'm up to 1.019 now. I'm going to wait an hour or so to make sure it is well dissolved before adding any more.
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Old 06-19-2004, 09:20 PM   #9
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Is there any particular reason an aquarium needs a higher SG? Isn't NSW closer to 1.021 than 1.025?
I don't know, but I'd love an explanation as well since what I had read indicated a 1.021-1.022 was ideal.

However, since I was pressed for time and since every bit of advice I have been given or read by steve-s so far has been right on the money, so I'm going going to trust his recommendation.
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Old 06-19-2004, 09:53 PM   #10
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I know my books say 1.024 to 1.026, depending on whether you have FOWLR or full reef w/inverts.

my instant ocean says 1/2cup per gallon should get me to 1.024 if using R/O.
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