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Old 10-31-2015, 08:18 PM   #1
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Benefical Bacterica

So refractometer reading was a little off ( it is now fixed) but my reading on salinity is high about 1.045.. will this affect my benefical bacteria? Im still in cycling stage
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Old 10-31-2015, 09:03 PM   #2
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I don't think so. How big is this tank? If it is over 55 gallons maybe take a gallon or two out and replace with FW.
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Old 10-31-2015, 09:09 PM   #3
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Get your SG straight .
IMO you are not growing the bacteria you want (if any) at that level.
My reasoning is that freshwater(1.0) has different BB then Brackish water(1.009ish),and full marine yet another different set of bacteria (at 1.025).
So at 1.045 if you had bacteria I think you killed it and if you are trying to cycle the level is in no way helping you at all.
No reason IMO to adjust slowly beside accuracy.
Get your sg right.
How are you cycling?
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Old 10-31-2015, 09:19 PM   #4
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Per this report


Nitrifying Bacteria Facts


It says


Salinity

Freshwater nitrifying bacteria will grow in salinities ranging between 0 to 6 ppt (parts per thousand) (specific gravity between 1.0000-1.0038).
Saltwater nitrifying bacteria will grow in salinities ranging from 6 up to 44 ppt. (specific gravity between 1.0038-1.0329).
Adaptation to different salinities may involve a lag time of 1-3 days before exponential growth begins.
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Old 10-31-2015, 09:44 PM   #5
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Yeah read up on that report after i posted the thread. I am currently fishless cycling. I threw in 4 jumbo raw shrimp. Im on my 3rd week of cycling. I also threw in some dr tims one and only. Im not in a rush here so i have lots of patients and i want to do it right. I want to make sure i have enough benefical bacterica and sg to be stable before i add anything.

Also i recalibrated my refractometer again by using arrowhead mountain spring water from the grocery store. Is that good enough? As far as recalibration. The manual said to use distilled water.
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Old 10-31-2015, 10:04 PM   #6
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Btw its a 75 gallon tank
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Old 11-01-2015, 12:39 PM   #7
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Refractometers should be calibrated using solution
Pond Testing Solution: American Marine Inc. 53.0 mS Calibration/Reference Fluid
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Old 11-01-2015, 12:56 PM   #8
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when you remove a few gals of saltwater to replace with fresh it will take at-least 8 hrs to get another accurate reading , you may need to do this several times to get the proper salinity of 1.025 .
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Old 11-01-2015, 02:24 PM   #9
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I will get the pm2 salinity module from neptune to get some better readings. At this point i just used rodi water to calibrate my salinity at 0.

After adding more freshwater im at 1.026 sg and 35 ppt now. I just hope i still have benefical bacteria still in my tank. Worst case ill add more nitrifying bacteria in my tank. Maybe do a 10% water change in two weeks.
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Old 11-01-2015, 02:39 PM   #10
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No 100% water change needed. Just gradually move it down. Maybe do a 1/4 change with water is low on salinity say 1.015. Than wait a while and test again.
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