The Hikari Bio-Gold with the probiotics is said to reduce waste. I had not used it in a long time but it didnt seem to make much difference from what I remember.
I decided on the heavy duty color enhancers with the Hikari parrot (float) and DynariX Super red (sink) to see if my red spot severum would color up even better and also if I would see a difference in the red tail gourami. If the DynariX sinking works, well I really cant do much with it for larger fish since its only in a 2mm. I could possibly switch to the NLS red sinking formula which goes to a 3mm but with NLS that is not that big. As for the Hikari parrot, it does go to a medium floating which may or may not work on large fish. Well when I say large, Im talking about the GIANT gourami at 18-20" which it has the potential to reach.