You will want to add copper to the newly mixed water.
sounds good ill wait about 5-10 more days and slowly start reducing
Correct, copper does not evaporate. It does not need to be added to RODI that's being added to compensate for evaporation.
I keep my salinity during copper around 1.019-1.020. I raise it slowly after fish have been transferred out of copper by topping off with saltwater instead of fresh.
The GC mixed with the food is to rid any potential internal parasites. You were mixing focus (sea chem) with that as well? That’s what binds the meds to the food. 14 days is long enough to kill most parasites however there could be stronger ones present. So I’d say as long as you don’t see any signs (white stringy poop) you should be good to go.
I would do the 14 days and then feed regularly with observing for any symptoms. I doubt there would be any I’ll effects however the more a fish is exposed to a medication, the less likely it is to treat something in the future. So I’d stick to the 14 days and then observe. If something pops up then begin treatment again.
Were you testing for copper at all after reaching 2.0 ppm? I’m currently on day 12 and I test every other day. I’m noticing my copper level has dropped a bit and have added to maintain the 2.0 level. I have a foam filter with biomedia, a hang on the back filter with biomedia in it and pvc pipes in the tank. Nothing else. I check with a Hanna test kit.
If you added copper to a tank with sand and rocks, and then did not test the copper every day, there is a very good chance the copper level fell below therapeutic levels.
Copper has to be a gradual increase. So dosing it to therapeutic levels (copper power 2.0 ppm) in one shot would be harmful. I’d say try some sort of bath (ruby reef rally). Do you have surface agitation with a powerhead pointed at the water surface? Is the fish eating and has it been eating?
