I recommend Omegatin by Kent feed. Kent feed and Blue Seal are the same companies, just depends on where you live. Find a local dealer, it should be cheaper. Tractor Supply sells Omegatin but it is way more expensive than from a dealer. Here is a link on Omegatin: https://kentfeeds.com/product/omegatin/
Kent and Blue Seal have great customer service so you can email them directly and get good responses on what products, then they can help you find a dealer if you don’t know of one already.