When it comes to the number of Cherry Shrimps kept in a 5-gallon tank, a general rule of thumb is to have 10 shrimps per gallon. This means that a 5-gallon tank can comfortably house up to 50 Shrimp.
However, note that although these types of freshwater shrimps have a minor bio-load, overstocking can lead to the quicker build-up of harmful waste and deteriorate the tank conditions. Aim for a lower number if you’re a beginner or want a less maintenance-intensive tank. Starting with 20-25 Cherry Shrimps would be a more manageable choice. Over time, they’ll multiply if provided with adequate conditions.