I have a betta fish that has ick can I use quick cure up to 3 times a day to cure him?

A huge thing to consider is that any medication, be it anti-fungal, anti-parasitic etc, is very potent. It may have worked for someone else, with certain fish in a certain tank, to up the recommended dosage, but you are always taking a huge risk in overdosing. Secondly, i just want to be sure this is actually Ick you are dealing with. Ick will be seen as tiny little white specks/dots, all over your fish. Ive seen over hundreds of bettas in my time and I can hardly think of one that actually got ick. Ick is a parasite, not an infection. The MOST COMMON maladies betts contract are fungal infections. These will manifest in the form of either fuzzy white around the body especially top of the head and gills. Or in stringy white things off the fins. There are numerous types of medication out there for fish and you want ot make sure you are using the correct ones. I have had luck with several different varieties but all are potent. Bettafix for example, has probably worked for me (when using the correct dosage, not overdosing) several times however, if it is fungal, the prognosis can be bleak. It spread very fast and usually the amount of shock form the medication it would need to kill the fungus will also kill the betta.) Whatever route you go, MAKE SURE you are doing frequent water changes in small amounts. Never change all of the water at the same time. Also, when medicating a tank, you want to me sure to REMOVE any carbon from the filter as it will absorb the medication. After your treatment is done and/or or tank is healthy again, replace (or add) the carbon to filter out the excess medication. Good luck!