dont put gouramis and bettas together. sparkling gouramis are peaceful, but its not the gouramis that are going to be causing the trouble; its the betta.
i would strongly advise against putting a dwarf gourami and betta together as well. nothing but aggression will come of it.
:iagree: yup , it s the betta that will shred the others , they r really brutal when they attack . and i don think betta and GBRs is a good mix too , the GBRs r colorful and the betta even after a year may decide there s no place for any other colorfull fishes in the tank !