I just put the phosban 150 on my tank yesterday. I got the mj-400 although in the directions it recommends a mj 500 :rollface: I dont think mj even makes a 500....
But I was also told to add the media slowly, I guess the reactors work really well and sometimes too fast. I was told that it would shock my tank if I absorbded all the phosphates too fast? Idk if this is true or not, but may be something to look into.