Taking fish from high sg to lower sg

hkgar · 12/01/2016, 12:25 PM

I am planning on getting some fish from LA. Three of the fish will be coming fro Divers Den and two from LA. One ships the fish wit a sg of 1.017 and the other at 1.025. I am not sure wwhich is which.

I know that you should raise the low sg slowly, over a couple days so I am going to set up my first TTM tank at 1.017. Can the fish that come at 1.025 be but into the 1.017 without any problems?

scooter31707 · 12/01/2016, 12:50 PM

IMO, yes. Fish can take a dip in salinity better than a rise in one.

Moort82 · 12/02/2016, 05:49 AM

Lowering salinity is much easier on the fish than going the other way due to osmosis. So bring them down to the same sg and then raise them up slowly during your qt period.

Sonyardo · 12/02/2016, 08:36 PM

I've lost a fish lowering salinity rapidly. So now I take my sweet time if I'm raising or lower Sg. Personally I would isolate the fish from the different Sg shipments and slowly adjust to bring them to a common QT. I would shoot for about 4 or 5 days to make the transition.

tkeracer619 · 12/03/2016, 12:40 AM

Personally I wouldn't mix fish from DD and LA in QT. Interestingly enough I have never had a fish from either source at that low of a salinity.

12/01/2016, 12:25 PM	#1
hkgar Registered Member Join Date: Oct 2002 Location: Dewitt MI Posts: 5,051	Taking fish from high sg to lower sg I am planning on getting some fish from LA. Three of the fish will be coming fro Divers Den and two from LA. One ships the fish wit a sg of 1.017 and the other at 1.025. I am not sure wwhich is which. I know that you should raise the low sg slowly, over a couple days so I am going to set up my first TTM tank at 1.017. Can the fish that come at 1.025 be but into the 1.017 without any problems? __________________ Gary 180 gallon, 40 gallon sump, 3 250 W MH + 4 80W ATI T5's, MTC MVX 36 Skimmer, Apex controller Aquamaxx T-3 CaRx Current Tank Info: A 2 Barred Rabbitfish, Red Head Salon, Yellow/Purple, McMaster Fairy, Possum, 2 Leopard Wrasses, Kole, & Atlantic Blue Tangs, 2 Percula Clown, 3 PJ and 1 Banggai Cardinalfish , Swallowtail, Bellus and Coral Beauty Angels

12/03/2016, 12:40 AM	#5
tkeracer619 Registered Member Join Date: Jan 2006 Location: Westminster, CO Posts: 17,289	Personally I wouldn't mix fish from DD and LA in QT. Interestingly enough I have never had a fish from either source at that low of a salinity. __________________ Hobby Experience: 9200ish gallons, 26 skimmers, and a handful of Kent Scrapers. Current Tank: Vortech Powered 600G SPS Tank w/ 100gal frag tank & 100g Sump. RK2-RK10 Skimmer. ReefAngel. Radium 20k.

12/01/2016, 12:50 PM	#2
scooter31707 Registered Member Join Date: Feb 2015 Location: Virginia Posts: 4,971	IMO, yes. Fish can take a dip in salinity better than a rise in one.

12/02/2016, 05:49 AM	#3
Moort82 Registered Member Join Date: Sep 2008 Location: Norfolk, England Posts: 1,576	Lowering salinity is much easier on the fish than going the other way due to osmosis. So bring them down to the same sg and then raise them up slowly during your qt period.

12/02/2016, 08:36 PM	#4
Sonyardo Registered Member Join Date: Mar 2013 Location: OC California Posts: 522	I've lost a fish lowering salinity rapidly. So now I take my sweet time if I'm raising or lower Sg. Personally I would isolate the fish from the different Sg shipments and slowly adjust to bring them to a common QT. I would shoot for about 4 or 5 days to make the transition.