+1 -- I agree with Lynda.
The white spots you mention could be a couple of different things. The first and most critical step, however, regardless of what they are is to improve your water quality, and maintain good water quality once it has improved.
If at all possible, please do invest in a gravel vacuum and a good liquid test kit. In my view, these are the two most important tools in maintaining a healthful environment for our fish.
Once you get the kit, if you post your ammonia, nitrite, nitrate and pH test results here, the community can help guide you through a water change and gravel vacuuming schedule that will help improve your water quality.
Also, in my opinion, meds should only be used to treat a known, specific ailment -- and are often not necessary as simply improving and maintaining good water quality will solve whatever issue is ailing our fish. Improve the water quality first, and as quickly as you can. Often, this will, all by itself, cause a marked improvement in the health of your fish. If it doesn't, the community can help you further from there -- but it all starts with water quality.
Good luck!