Becky, how much do you dilute the H2O2? We don't want Donna using the full-strength stuff on her plants! I used a 32/1 (which is 1oz peroxide to 32oz. of water or 4oz. per gallon) solution. The stuff that comes in the bottle is 3% which will bleach out just about anything it touches (so beware of your clothes when you're measuring it).
On the Epsom Salts, I water my brugs about once a month in summer with about 1tsp. per gallon of water. It's very soluble, so if it's been raining heavily every day, I might do that more often. I think I'll add the peroxide to that mix, so I'll remember to do it regularly through the hot weather.