Do Cherry Shrimp Need RO Water? What Kind of Water Do They Need?

Minimum Tank Size

Start with a 10-gallon aquarium minimum. This gives your shrimp enough space and adequate water volume to maintain stable parameters. While cherry shrimp can technically live in smaller containers, a 10-gallon provides a buffer against rapid parameter swings that can stress or kill them.

Substrate Choice

Your substrate choice is straightforward: use whatever inert material you prefer. Sand, gravel, aquarium soil-it doesn't matter as long as it won't leach chemicals or decay into your water. Many keepers favor sand or specialized aquarium soils because they look natural and provide a good surface for beneficial bacteria and microorganisms that shrimp graze on.

Water Temperature: No Heater Required

One of the best things about cherry shrimp is their flexibility with temperature. Unlike tropical fish that demand strict warmth, cherry shrimp thrive in 65-75°F (18-24°C).

Here's the key insight: warmer water increases shrimp metabolism. The warmer your tank stays, the faster they breathe and the shorter their lifespan tends to be. This is why many experienced keepers simply let their cherry shrimp tanks sit at room temperature without a heater. If your home sits in the mid-60s to low-70s, your shrimp will be just fine-often better than in constantly heated tanks.

Avoid cold shocks below 60°F, which can stress them severely, but you don't need to obsess over precise heating.

Do Cherry Shrimp Really Need RO Water?

This is the core question, and the answer is clear: No, cherry shrimp do not need reverse osmosis water.

Many online resources make shrimp-keeping sound complicated and expensive, but cherry shrimp are genuinely tough. They adapt well to tap water in most regions, provided the water is free of chlorine (use a dechlorinator) and doesn't have extreme hardness or pH swings.

What Water Parameters Actually Matter

Stability is everything. The biggest threat to cherry shrimp isn't the absolute value of a parameter-it's sudden changes.

• Nitrate swings: Rapid spikes in nitrate stress and kill shrimp. Keep nitrate under 50 ppm with regular water changes.
• Temperature shifts: Sudden temperature drops or jumps can trigger molting problems or death.

• pH crashes: Acidification in planted tanks can happen faster than you'd expect.

The solution isn't fancy equipment-it's consistency:

• Do 10-20% water changes every week or two to dilute accumulated waste and maintain stable parameters.

• Acclimate new shrimp slowly when introducing them to your tank. Float them in a breeder box for 30 minutes, then gradually add small amounts of tank water to their container over another 30 minutes before releasing them.
• Avoid rapid fluctuations in temperature, feeding, or light schedule.

The Right Filter Choice

Most people use hang-on-back (HOB) filters, but that's a mistake for shrimp tanks. Always use a sponge filter instead. Here's why: shrimp are tiny and can be sucked into HOB intake tubes. Sponge filters create gentle flow that supports beneficial bacteria without the risk of injury. They're also cheap, quiet, and perfect for planted tanks.

Live Plants: Not Optional

This is non-negotiable for a thriving cherry shrimp colony: use live plants.

Shrimp do dramatically better in planted tanks than in bare setups. Plants provide:

• Grazing surfaces where algae and biofilm accumulate
• Hiding spots that reduce stress and encourage breeding
• Oxygen generation that improves water quality
• Natural water polishing that reduces the need for large water changes

Invest in a decent LED planted-tank light (a basic 10-20 watt fixture costs $25-50). Good lighting makes plants thrive, and when plants flourish, shrimp follow. They really do go hand in hand.

Low-light plants like anubias, java fern, and moss are perfect for beginners and require minimal effort.

What Cherry Shrimp Eat

Cherry shrimp are grazers, not active hunters. In a well-established planted tank, they need very little supplemental feeding.

Natural Food Sources

• Algae and biofilm on plant leaves, driftwood, and glass
• Microorganisms (bacteria, protozoa) that colonize surfaces in your tank
• Decaying plant matter from dead leaves and substrate debris

Supplemental Feeding

You don't need to feed your shrimp every day. In fact, the best approach is to let your tank mature naturally. Older planted tanks naturally accumulate enough algae and microorganisms to support shrimp indefinitely. Many experienced keepers go months without deliberate water changes because the shrimp bioload is so minimal.

If you want to supplement:

• High-protein pellets made for shrimp are available, but unnecessary in established tanks
• Blanched vegetables (zucchini, spinach) can be offered once or twice weekly
• Dried leaves (Indian almond leaves) provide both food and tannins

Don't Fear Algae

Many aquarists panic about algae, but in a cherry shrimp tank, mild algae growth is a feature, not a bug. Your shrimp will spend much of their day grazing on it. A light coating of green algae on surfaces is ideal; excessive algae (like thick green water) still signals a tank imbalance and needs addressing, but don't try to sterilize your tank.

Tank Mates: Proceed with Caution

Cherry shrimp can be kept with fish, but there's a major caveat: most fish will eat shrimp fry if you're trying to breed them.

Safe Tank Mates

If you want a community tank, these options tend to work:

• Small guppies (if you accept that some fry won't survive)
• Bristlenose plecos (herbivorous, gentle, and ignored by shrimp)
• Other small, non-aggressive fish like endlers or tetras in larger tanks

Shrimp-Only Tanks Are Ideal

Honestly, shrimp-only tanks are the easiest and most rewarding option. They require minimal feeding, infrequent water changes, and are perfect for observing natural shrimp behavior, breeding, and colonies. There's no aggression, no competition for food, and no worry about fry being eaten. Start here if you're new to the hobby.

Summary: Simple Basics for Cherry Shrimp Success

Here's what you actually need:

• A 10-gallon minimum tank with inert substrate
• Room-temperature water (65-75°F) with no heater needed
• Live plants and an LED light to help them thrive
• A sponge filter for gentle, safe filtration
• Weekly or biweekly 10-20% water changes to maintain stability
• Slow acclimation when introducing new shrimp
• No RO unit, no fancy chemicals-just consistent care and patience

That's it. Cherry shrimp are tough, hardy invertebrates that reward simple, thoughtful care with thriving colonies and, if you want them, natural breeding. Stop worrying about whether your tap water is "perfect enough"-it probably is. Focus instead on keeping conditions stable and letting your plants and shrimp do what nature designed them to do.