As for the above 2 posts no offence intented, but have you ever kept and failed with Tropheus keeping/ requirements? I have! Many others have too and for a few simple reasons ( water parameters included, not just food ). People have fed Thera A to their Tropheus because it works for Tropheus. A couple of other brands have worked too but it has been all trial and error. Way back when people 1st started importing Tropheus ( to my knowledge) aquarists had many a drama with fulfilling their fishes dietary requirements. Leading to bloat and impending doom of their hard earned moolar$. My point is. Wouldn't you want to feed the best possible food suited to your specific fishes needs? Why would you settle for sub par foods? As humans don't we strive to improve all things in OUR day to day life? So therefore why wouldn't a company like NLS want to be the best and create and keep researching to try and supply better foods for our fish? That's why they are a successful brand. We all have our favourite fish right? All have different dietary requirements? Why not create foods that fit our fishes needs. Rant done, no offence intented but really it's a no brainer why a new NLS product has been tested and created.