I have an idea for a 29 gallon tall community tank involving Pea Puffers modelled after someone else's tank who managed to successfully breed them in that same water volume.
-15 Pea Puffers (4 males, 11 females)
-5 Kuhli Loaches
-6 Amano Shrimp
-Tons of Neocaridina (apparently the Peas go crazy...