Ok great. Will go to 1.010-11 unless this will cause any issues (angelfish, moreish idio, hawkish,clownfish). Will pick up some calibration solution for the refractometer too. I have a seachem alert in the tank and prime on hand just in case. Thanks for the help guys.The standard low salinity for flukes is 1.012. The issue is, if your hydrometer is off by a little, 1.013 might not then be low enough.
Flukes will drop off in a day or so and the scratching typically stops a few days after that. However, fluke eggs are not harmed by the hyposalinity, so you need to keep the fish in that for 30 days to ensure that the eggs die.
1.012 will not kill off all of the bacteria, you likely will not see an ammonia rise unless the tank had a lot of algae in it that died off.