Hypo salinity increase schedule
- Thread starter Spar
- Start date
Spar
New member
bump. since it was sunday and I was home i went ahead and added pretty slowly. the one thing i noticed was the pH jumping up pretty quick. it went from 8.06 to 8.22 throughout the day, but in .02 increments each hour or so, so not too quickly.
still would like some thoughts around how much SG can jump at a single point in time though.
still would like some thoughts around how much SG can jump at a single point in time though.
jcw
Active member
I've read that increasing salinity too fast can cause oxygenation problems and stress on the fish.
Any marginal fish might not be able to tolerate a rapid increase.
http://www.wetwebmedia.com/ca/volume...linity/OST.htm
When you are ready to return the system to normal salinity, simply reverse the process, remove some of the low salinity water in the aquarium and replace it with high salinity water. However, when returning the salinity to normal, it's extremely important to take your time and raise the salinity slowly and gradually. Fish can become dehydrated if the salinity is increased too rapidly, so be methodical and raise the salinity over a period of several days. In addition, the aquarium water will can hold less and less dissolved oxygen as the salinity is raised, so there is a potential for gas supersaturation to occur if the salinity is raised too quickly. Don't hesitate to take a full week or more to return the specific gravity to normal levels again in small increments.
http://reefkeeping.com/issues/2003-08/sp/index.php
Low salinity has been demonstrated to be an effective treatment against Cryptocaryon irritans (Noga, 2000). A salt level of 16 ppt or approximately 1.009-1.010 specific gravity at 78-80*F for 14 days was reported to kill the parasite. I have never experienced problems when placing fish into a hyposalinity treatment, but have routinely witnessed fish showing obvious signs of distress when brought back to normal salinity levels too quickly. For that reason, I try to limit the specific gravity increase 0.001-0.002 points per day.
Here's an article about the benefits of hyposalinity in acclimating fish. After reading this article, i'm a rather firm believer of the qt and hypo process.
However, people with much more practical experience than me have said that fish can tolerate increases without problems.
IMO, if your fish are fat and healthy and hardy, quicker increases in salinity are tolerated well.
If your fish have open wounds, recovering from disease, generally fragile species then the drop in oxygenation might be fatal.
Any marginal fish might not be able to tolerate a rapid increase.
http://www.wetwebmedia.com/ca/volume...linity/OST.htm
When you are ready to return the system to normal salinity, simply reverse the process, remove some of the low salinity water in the aquarium and replace it with high salinity water. However, when returning the salinity to normal, it's extremely important to take your time and raise the salinity slowly and gradually. Fish can become dehydrated if the salinity is increased too rapidly, so be methodical and raise the salinity over a period of several days. In addition, the aquarium water will can hold less and less dissolved oxygen as the salinity is raised, so there is a potential for gas supersaturation to occur if the salinity is raised too quickly. Don't hesitate to take a full week or more to return the specific gravity to normal levels again in small increments.
http://reefkeeping.com/issues/2003-08/sp/index.php
Low salinity has been demonstrated to be an effective treatment against Cryptocaryon irritans (Noga, 2000). A salt level of 16 ppt or approximately 1.009-1.010 specific gravity at 78-80*F for 14 days was reported to kill the parasite. I have never experienced problems when placing fish into a hyposalinity treatment, but have routinely witnessed fish showing obvious signs of distress when brought back to normal salinity levels too quickly. For that reason, I try to limit the specific gravity increase 0.001-0.002 points per day.
Here's an article about the benefits of hyposalinity in acclimating fish. After reading this article, i'm a rather firm believer of the qt and hypo process.
However, people with much more practical experience than me have said that fish can tolerate increases without problems.
IMO, if your fish are fat and healthy and hardy, quicker increases in salinity are tolerated well.
If your fish have open wounds, recovering from disease, generally fragile species then the drop in oxygenation might be fatal.
