I use instant ocean regular crystals for my fowlr
and reef ones for my reef tanks. I have had zero issues with it and will continue to use it.
I've tried a few other brands but did not notice any difference so I'm sticking with the cheaper salt that works just as well.
I do dose a couple times a week in my 125g but that's due to the amount of corals I have in there and my water change schedule. If you go with weekly water changes you should not run into any problems with the instant ocean.
For the record, people have strong opinions on salt mixes and everyone has a favorite so my best advice is to use whats working for you and find your own favorite.