like esmith says 1.235 is waaaay to high of salinity. if that is correct, there is a good cause of your stress. To be honest, things are pretty screwd up rite now. I don't know quite which way to tell yuou to go. First off , do you have any animals in the main tank? You need to start dropping that salinity down with even large water changes if needed, but not all at once. That is really high,but you can,t do it all at once, but since it sounds like the quarantine tank maybe screwed up worse now i would do it in a couple of days, which ain't good for the fish to drop it that fast, but it is probably the lesser of to evils rite now. Get the poly filters working and i would get the fish back over there tonite if it was me. As for you're quarantine tank it sounds like you mite have overdosed the copper and killed off the bacteria in the bed and rock, I don't know. Why did you put the copper in there????? There are so many variables now in your quarantine tank that you have to deal with? Is the good bacteria dead? How much copper is truly in the tank? Is my test kit compatable to the type of copper I am using so as to give me a proper reading of the copper level? Is my salinity rite in this tank? When treating with copper you have to be super careful and do it sloowly so as not to kill everything else off in the tank and use a test kit that well test the copper you are using. There is plain copper, chelated copper and a bunch of others out there bound up with different things and not all test kits work with all of them. I have read that seachems cupramine is one of the beter ones on the market and they make their own test kit that works with it, i hope since i mentioned this you won't run out and buy this now and dump this in. The new hypersalinity treatment is a better opion in the future i believe, I haven't use it but i have seen a lot of post on the technique and it seems to be a better way to go on the quar. tank and the fish. I guess I would get the clowns out of the q tank since it sounds like it maybe be screwed up worse. get some genuine poly pads on the big tank, get the salinity down in two or three days which is fast but probably better then the other situation, and for your'e clowns sake quit dumping all these chems in your tanks, chems are not a cure all and other then for some bacteria problems are way over advertised in the mags as a cure all and qarunteed to cure your fish of anything and everything. Also if you are using one of them swing arm hydrometers, get youself a temp. compensated float hydrometer to double check it, I have tested some of these plastic swing arm ones against my refractometer and found them to be off, not as much as you are but a lot more then you want if you have corals someday. Remember what has been said, these little guys are tuff and well kick this on their own if you settle down and get yor tank in good order, healthy clowns are very strong little fish, and pleeeease don,t do treat them with anymore chems you are going to end up getting a bacterial infection going in them if they get weak enough and that is reaaaally hard to cure. WATER QUALITY!!!!!!!!!!!