Chiming in late here. But the problems no doubt started when you added all those fish all at once. Stress, stress, stress. Take it from me, after this is done, if you have lost fish, take your time adding new ones.
There is a lot of dispute on lights. Rose, I know, turns off the lights and wraps the tank in a blanket to make it as dark as possible while treating for ick. So there are many paths to success.
Coppersafe contanes cheleated copper. In other words, it contains copper. Even without live plants, the longterm effects on the fish are a subject of some controversy among many, and I avoid products with cheleated copper.
Now for the part CM would be waiting for me to say, no doubt: many folks have great luck with maracide and you'll find many experts here swear by it. My experience with it was that fish died, ick did not go away. In particular, the loaches did not do well.
Ridich+ may be a safer bet, though I'd still anticipate some losses.
Now, for the part that will seem contradictory, the only product that has successfully combatted whatever strain of Ick my tanks have encountered here in Chicago is Aquarisol. Aquarisol contains copper salts of some sort, I don't entirely understand in what form. But I've been assured and have tested and have discovered no detectable increase in copper readings after use as directed. So free-floating copper ions do not seem to be a problem with this product. My live plants are happy as can be, and the fish are cured.
I invested money in a Turbo-Twist UV sterilizer, and in combination with the Aqauarisol have had no problems with ick since. This was after 6 months of continuous problems. If money is not a severe limitation, the $100 or so spent would be worth it in terms of cost of meds, fish, and time.
But I'd recommend to you sticking with Ridich and using it religiously according to instructions (continuing treatment a minimum of 5 days after EVERY LAST SPOT is gone). Do normal water changes every couple of days, lightly vacuuming the gravel to suck up whatever nasties you can (but don't disturn the gravel in any violent way). Keep the carbon out. Temp can go to 85, but make sure you have good aeration (surface agitation, airstone, etc) if you go that high. I think that is it.
Oh, and yeah, no new fish for a while after it is cleared. Wait a good 3 weeks at least with NO spots during that period on any fish.