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Old 05-16-2011, 08:26 PM   #1
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High salinity

Since about 2-3 weeks ago, my fish kept dying( 1damsel, shrimps, snails, goby ,1 clown ). I checked everything and it was perfect. A visit to the LFS with a batch of my water indicated that my salinity was off the charts.
Anyways , should I do a major water change or in batches of 20% per day? I still have a clown and a damsel alive in my 30 gallon. Please advise
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Old 05-17-2011, 03:21 AM   #2
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You should do a 20% water change but with just RO/DI water, no salt in it, this will bring it down a little then do like 5% everyday till it is at 023/025
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Old 05-17-2011, 03:22 AM   #3
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Oh and do you have a refractometre?
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Old 05-17-2011, 07:28 AM   #4
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If you don't have one this is the one I recomend. I know it's a little pricey but it will be the last one you ever buy. It's easy to read and is on the money every time.

Vital Sine Refractometers

Regardless if you go for this one or a cheaper one you're best bet is to get some kind of refractometer cuz the SG indicator gauges are off by quite a bit. And Tom tom is right all you need to do is a 20% and add just RO/DI water or Distilled if you are in a pinch. Good luck.
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Old 05-17-2011, 08:02 AM   #5
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I would not remove 20% of the water and add plain water. That's a drastic and sudden change and that is never a good thing. Exactly how high is your salinity?
I would suggest taking out 1 gal of water/day at most and replace it with fresh water. You never want to have big swings in any water parameter. Everything should be done slowly.

What exactly did you test since you said... "I checked everything and it was perfect."
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Old 05-17-2011, 08:29 AM   #6
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Thanks for the advice guys.
I'm doing a 20% water change everyday(rodi fresh water). And I tested my water for ammonia, nitrates, nitrites, ph, phosphates. Everything is 0 except fir the nitrates which is still below the recommended levels. The ph is at 8.0.
My salinity before I did any water change was even above the maximum level on my new hydrometer. I think I might invest in a refractometer. Thanks again guys
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Old 05-17-2011, 03:25 PM   #7
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take ccapt's advice,dont change 20% with ro/di water,thats too much too quick.
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Old 05-17-2011, 06:23 PM   #8
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I agree. Do the 1 gallon sw out and 1 gallon FW in.
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Old 05-17-2011, 06:26 PM   #9
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also hydrometers arent really accurate you cant really tell how high or low your salinity is with precision
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Old 05-17-2011, 10:48 PM   #10
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When I had my hydrometer my salinity was up at 1.028-1.029 and my fish survived that. Yours must be absurdly high?
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