I have a nano that Is pretty full. I’ve noticed a lot of the bounces are pretty big. I have went with the multicolored disco types because they are smaller. Check out jawbreakers, candy crush, kryptonite, deadpool and electus shrooms.
Theres tons of really nice shrooms. Bounces, Jawbreakers, Electus. Honestly it comes down to preference at this point.
What are you looking to achieve?
I'd find the ones that you really like.
I think mushrooms are really cool. I've got most of mine eating mysis shrimp now. They grow and multiply fast. Just choose wisely.