Would 8-12 be an okay number or lower like 6?
Thank you for the input!In this case, foot print is more important. It is a tall tank, but you still have the footprint of less than a 20g long. Number to gallon-wise, it is OK, but they might be crowded at the bottom and the tank will have an empty look. On the other hand, they like being crowded. So it is up to you. I think I would be in the 6-8 range with a lot of things for them to get in and out of. You might want ornaments (driftwood) that go all the way to the top, so shrimp can occupy that space and the tank doesn't look empty.