The size of grand sumo seems to be what hikari calls mini. Is this correct? It just looks so much smaller than the cichlid bio gold. I just want to make sure I did not buy some fake bottle. They are also browner and not green.
I've used both plus many others. GS does appear browner and are smaller than hikari's bio gold. Both very good products imo.
I was always wary of possible imitation of gs so I always bought from reputable sellers with good ratings. Fakes are out there. Where did you purchase the gs?