about 2 days ago I noticed some spotting, so I went and bought "coppersafe," a medication for healing ich.

I also did a 75% water change, and now my water levels are all perfect.

Now, 2 days later, the water is still pristine, and my fish has more spotting and now very red gills; is getting worse.

Should I try another treatment, do a water change?

hross, we need you to fill in the answers to the questions above. Since your water was recently bad, let us know what those results were too and for how long. Then post the current info.
It is hard to say what you should do without more of this information. Thanks