Gouramis are pretty infamous for eating shrimp. It would be a costly snack.
If you want to test your fish to see if he will shrimp, I would get a couple cheap glass shrimp.
I have six otos in my 29g, and IMO they are much more interesting in a group. Otos are social fish, and you should keep atleast three of them. They are a low bioload fish, so getting a couple more shouldn't be much of an impact on your tank.
The definition of insanity is doing the same thing over and over again and expecting different results.
- Rita Mae Brown
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