Did you know when choosing a fish oil the omega 3 content is not the most important factor, but what the breakdown of omega 3 fatty acids into EPA and DHA is.  Also the purity, concentration, processing methods are important in getting a good quality fish oil.  A good quality fish oil shouldn’t give you reflux or smell fishy.  This is a sign your oil could already be rancid which defeats the purpose in taking it in the first place.