Secure the remaining lines
Check both tanks and equipment so no additional shrimp are transferred accidentally. Use clear tank labels and dedicated tools if possible.
Do not claim a line is unchanged if you cannot rule out mixing. Accurate records protect future breeding decisions.
Choose a responsible next step
You can keep the mixed group as a display colony or begin a new breeding project from a documented source. Each choice should include enough tank capacity.
Do not release shrimp outdoors or sell a mixed group under a pure-line label. Explain uncertainty honestly to any recipient.
Update your records
Write down the date, likely source of the mix, animals involved, and equipment changes. Keep the previous records rather than deleting them.
A clear history lets you learn from the mistake and prevents the same confusion from recurring.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.