Please make sure that you're using a refractometer for checking your salinity. The +/-.04 error of the hydrometer makes it a dangerous tool at the levels that you need for treating fish with hypo. Your water needs to get to and be at 1.009 without wavering. It will take 3-5 days for all the spots to "fall off" the fish, but once they do your fish will recover quickly.
If you wanted to start copper right now you would have to spend 5 days getting your salinity back up to operating levels prior to beginning the copper treatment. That doesn't sound like a very good option right now.
Make sure to keep tabs on your PH
and alkalinity while your tank is at hypo levels. You'll likely need to buffer top off and change water to keep the levels up high enough.
Paraguard is unnecessary when using hypo. Hypo works well all by itself. You just have to be testing accurately for your SG
. Also watch your ammo in that tank. You may experience a lot of die off due to the change in salinity from your rock.