I have a 20 gallon relatively planted tank with 8 neon tetras, 3 fancy guppies, 2 siamese algae eaters, 5 amano shrimp, 1 bamboo shrimp, 6 blue velvet shrimp, and 20 or so rcs. everything seems healthy, the only casualties were a few rcs after some of them got sick.
considering the population...