Does rapid drop (or increase) in salinity affect bacteria?

Nas · Post by **Nas** » Fri Mar 21, 2008 1:57 am

I know that the beneficial bacteria in freshwater is not the same as with brackish and salt water tanks but i was wondering if a sudden change in salinity would affect the beneficial bacteria on my tank?

I keep mine at 1.008 but today i did a water change and spilled some of the water containing the last of the salt i had. Now the salinity in my tank is around 1.004. I was just wondering if the sudden drop would have any negative effects on my tank or fish...

Post by **Pufferpunk** » Fri Mar 21, 2008 2:37 am

You may be OK--you're still in the range of mostly FW bacteria, with some SW bacteria starting to develop.

Post by **Corvus** » Fri Mar 21, 2008 4:16 am

I do that pretty often to simulate an estuary (I have other tanks in case of trouble).
If it works for you, you'll know by simply measuring your nitrItes (and possibly ammonia).
No nitrites, no problems.

By_a_coo · Post by **By_a_coo** » Fri Mar 21, 2008 12:56 pm

Once I dropped mine from 1.004 to 1.000 and nothing happened. Is there only risks if you raise it too fast? I'd like to know more about it...

Post by **Corvus** » Fri Mar 21, 2008 1:03 pm

By_a_coo wrote:...I'd like to know more about it...

There you go:
http://www.pubmedcentral.nih.gov/articl ... tid=168074

Post by **Pufferpunk** » Fri Mar 21, 2008 7:29 pm

Why can't they write those things in "English"?

By_a_coo · Post by **By_a_coo** » Fri Mar 21, 2008 11:25 pm

Thanks a lot Corvus, I really appreciated it!

Pufferpunk, are you saying that related to technical terms? LOL If you are, I know how you feel. I had to read that and re-read and re-re-read... LOL

SpockthePuffer · Post by **SpockthePuffer** » Fri Mar 21, 2008 11:34 pm

Pufferpunk wrote:Why can't they write those things in "English"?

my brain shut off and my eyes glossed over after the first four words, lol Science is not my strongest subject, thats why I'm in art school

Jase · Post by **Jase** » Sat Mar 22, 2008 1:05 am

... I understood it fine.

I are good understand big words

pufferfreak · Post by **pufferfreak** » Sat Mar 22, 2008 1:27 am

I guess thats a good thing. LOL

crazedpuffer · Post by **crazedpuffer** » Sat Mar 22, 2008 8:28 am

Jase wrote:... I understood it fine.
I are good understand big words

I'm sure you are Jase.... actually I kind of understood it too

CoreyK · Post by **CoreyK** » Sat Mar 22, 2008 1:34 pm

The abstract is basically saying that the spp. of bacteria that perform the majority of nitrification ("good bacteria") in natural systems is a different majority than the bacteria that perform nitrification ("good bacteria") in aquariums, and that how it works in the real world is likely much more complex than in our simple aquariums.

Corvus - I've often thought about changing up the salinity. Do you notice any behavioral effects?

Post by **Corvus** » Sat Mar 22, 2008 1:48 pm

CoreyK wrote:Corvus - I've often thought about changing up the salinity. Do you notice any behavioral effects?

Not really. They are happy with any salinity I've tried except freshwater and they have no problems with osmoregulation.

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