The Short Answer for Ghost Shrimp
A handful of ghost shrimp will fit physically into a very small aquarium, but fit and comfort are different questions. About five gallons can support a small group on its own, while ten gallons is the better recommendation for most homes because a larger volume of water changes temperature and chemistry more slowly. Shrimp feel those swings quickly, and a beginner mistake with food or a late water change does far less damage in ten gallons than in five. If other fish are joining them, treat ten gallons as the real floor rather than an upgrade.
Why Stability Matters More Than Floor Space
Ghost shrimp are small, nearly transparent scavengers that spend their day walking the bottom and picking at leftover food, soft algae, and decaying plant matter with tiny claws. They do not need swimming room the way an open-water fish does. What they need is steady water, because each shrimp regularly sheds its shell to grow, and the hours after a molt are when it is soft, hiding, and vulnerable. A tank that is too small tends to swing between feedings and water changes, and those swings are what stress a colony, not a lack of open floor.
Setting Up a Shrimp-Friendly Tank
Start with a gentle filter, ideally covered with a fine sponge so baby shrimp and weak swimmers are never pulled toward the intake. Add live plants, a clump of moss, leaf litter, or small ceramic hides, spread across the bottom rather than bunched in one corner, so a freshly molted shrimp can disappear close to wherever it sheds. Keep the layout low and cluttered at shrimp level: open gravel alone leaves them exposed. A secure lid matters too, since shrimp can climb filter lines and corners when water quality bothers them.
How Many, and With Whom
Ghost shrimp are social in a loose, unbothered way and look best kept as a small group rather than singly, so plan the tank around a group plus the waste they and their tank mates produce. Choose peaceful companions — small rasboras, tiny tetras, snails, or other dwarf shrimp suit them — and avoid loaches, large cichlids, bettas with a hunting streak, and any fish big enough to treat a shrimp as a snack. Because ghost shrimp are often sold as feeders, inspect new arrivals for a milky white body, which can signal illness, and give them a few days of close watching before you relax.
Daily Care and Warning Signs
Feed lightly: a colony in a planted tank finds much of its own food, and heavy feeding in a small volume is the fastest route to cloudy, fouling water. Watch for shrimp gathering at the surface, frantic swimming in daylight, or several failed molts with shells split only partway — each points to water that needs testing and a partial change rather than more food. Healthy ghost shrimp are glassy-clear, busy, and mostly ignore you. Keeping the tank's test results, molt notes, and feeding turns in one shared place helps a household spot a drift early, and KinsLe Family Sharing lets everyone who tends these shrimp share the same profile and care details.