How to Acclimate Your New Shrimp, Fish and Snails

Dark red Neocaridina shrimp in a planted freshwater aquarium

Acclimate new freshwater shrimp, fish and snails by matching temperature first and then gradually mixing small amounts of aquarium water into the shipping water. The exact pace depends on livestock and the difference between waters, so keep the process calm, measured and species-aware.

At Razz Aquatics, we prioritize reducing abrupt changes—not rushing livestock straight from the bag into the aquarium.

Acclimation checklist

Prepare first
Dim lights, test the aquarium and ensure it is fully cycled.
Match temperature
Float the unopened bag where appropriate while monitoring conditions.
Mix gradually
Add small amounts of tank water over time; avoid sudden chemistry change.
Transfer carefully
Move livestock without adding shipping water to the aquarium when practical.

Simple acclimation process

  1. Check the aquarium: ammonia and nitrite should be zero.
  2. Dim lights and match temperature according to livestock and shipping method.
  3. Move livestock to a clean container and add small amounts of aquarium water gradually.
  4. Observe livestock; do not force a rigid timeline when conditions differ.
  5. Transfer carefully, then keep lights low.

What not to do

  • Do not add shipping water to the aquarium just to speed up transfer.
  • Do not acclimate into an uncycled tank.
  • Do not make large chemistry corrections while livestock is acclimating.

Read our cycling guide, freshwater shrimp care guide and nano fish care guide.

Browse our freshwater shrimp collection when your aquarium is prepared.

Frequently asked questions

How long should I acclimate freshwater shrimp?

There is no one safe timeline for every shipment. Match temperature and mix water gradually based on the difference between waters.

Should I pour shipping water into my tank?

When practical, transfer livestock without adding shipping water to the aquarium.

Can I acclimate livestock to an uncycled aquarium?

No. Acclimation cannot make an uncycled tank safe.

By Razz Aquatics
Updated September 14, 2026

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