Originally Posted by robocop
Is it ok to take out and lower the salinity of the main tanks water to do a water change?
No, using the water from the main is acceptable for the initial fill of the QT
but nothing else for two main reasons.
The main tank could possibley still contain the virus/parasite you are treating for thereby transfering the problem with it. The other is the main will have a certain degree of DOC
which will hamper water quality in the QT
adding to your problems.
It's best to do your water changes with well aged (24hrs) and aerated freshly mixed SW
. It avoids alot of issues and at the same time helps buffer water that is otherwise supressed by the hyposalinity process. When performing hyposalinity it is quite important to monitor the alk
/pH as it has a tendancey to drop.
Be absolutely sure you are not combining hypo with a copper treatment, one or the other not both
. Combined as one treatment would be too stressful on the fish and cause death.