lowering and increasing salinity - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 8 Old 11-01-2009, 07:49 PM Thread Starter
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lowering and increasing salinity

what is the easiest and safest way to increase or lower salinity?
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post #2 of 8 Old 11-01-2009, 11:03 PM
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To lower salinity add freshwater (RO/DI) with no salt in it, small amounts at a time and 24 - 48 hrs between additions to allow tank to fully mix and give a new accurate reading.

To raise salinity use premixed saltwater that has a higher salinity than what is in the tank, again in small amounts and waiting 24 - 48 hrs between additions to allow for full mixing and new accurate readings.

Dawn Moneyhan
Aquatics Specialist/Nutritionist
Juneau, WI
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post #3 of 8 Old 11-02-2009, 04:54 PM Thread Starter
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what do i do when the tank water gets low during a cycle but the salinity keeps rising?
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post #4 of 8 Old 11-02-2009, 07:06 PM
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The salinity is rising because salt does not evaporate. As freshwater evaporates, the salt per gallon is higher. You simply replace evaporation with freshwater to maintain the proper water level.
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post #5 of 8 Old 11-02-2009, 07:09 PM Thread Starter
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well i read on one of your post that when the tank is going through a cycle you should never add water.
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post #6 of 8 Old 11-02-2009, 07:13 PM
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Quote:
Originally Posted by jjtf00 View Post
well i read on one of your post that when the tank is going through a cycle you should never add water.
I may have had a typo. Sorry.

You probably do not want to do a water change during the cycle. However, in a properly set up marine aquarium, the cycle will be very short. Generally you will only have a traditional ammonia and nitrite cycle for a few days to a week, unless the rock is uncured.
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post #7 of 8 Old 11-02-2009, 07:14 PM Thread Starter
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i lose about a half inch of water every two days. is that bad?
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post #8 of 8 Old 11-02-2009, 08:28 PM
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Water loss depends on the humidity in the air and the aquarium temperature. Your situation does not sound unusual.
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