I absolutely agree. The hardest part of being a new fish keeper is sorting through the constrasting info. When I found this site, and found that most of the advice on this site works, I was overjoyed. I generally do whatever Diana, Shari or Martin tell me. And quite a few others who have never led me astray.
One thing I have learned is that at a LFS, I ask each person who tries to help me three simple questions that I know the answers to. If they get the questions wrong, I know they don't know what they are talking about. If they tell me that they do not know, then I trust them. It is the people who pretend they know who are scary. I ask simple questions. "Will this common pleco outgrow my 5 gallon tank?" I know the common plecos can reach over 20". "Can loaches tolerate salt in their water?" No. "Will my bichir eat my tetras?" Yes. I had a saleslady try to sell me a killie telling me they make great companions to tetras. THen she bagged the neons with the killie,a nd we looked in the bag, and the 1.5" killie had 3/4s of a 1" neon in its mouth. The salesgirl freaked, and did pull the neon out and plop it back to its tank. I went home with neither.
I worked at a fish store for a few months, and I know that the goal of many is to sell products and livestock. They let me go, because I refused to sell fish if tanks were not ready or if the people had ick. They encouraged us to sell fish to people with new tanks and sick fish, because they knew the fish would be dead in a week and they could double their money. I think it is unethical and cruel. But that is much of the industry. So if you are getting advice from an LFS, make sure the person knows something about fish, and that they have your fish's health as a priority over their ability to make a buck.
Follow the instructions on the stickie for the ick treatment. Remember it is specifically aimed for loach owners. Lots of people know about fish and know nothing about loaches. And I have used salt in the past with mixed results. Remove the salt from the water slowly, and continue with what you are doing. Increase the water quality and air, continue vacuuming and everything will get better.