Honestly I never tried but I heard good reviews. I think it's not good idea to blind add supplements, u don't even know which element is lack or more, by over adding will result bad. I recommend getting all the test kit like potassium iodine strotrium etc. that's what I got and tested with my regular water change and consumption, I don't even need to add too much potassium Cuzbthey are in the right range. It also matter which type salt u use, these are where the element from when u do WC. As well, Red Sea recommend adding these formula combining the NOPOX, Cus the nutrients impact the growth too.nso make sure what u are lack, try start working these first instead of just listening to LFS. Not saying they are wrong,but u know sometimes they want to make money or just not in the mood of sharing ideas with u.