Why tube hides matters
Small tubes can provide shelter, but material, diameter, finish, and cleanability should all be considered. In a shrimp-focused aquarium, the choice should also support steady routines, visible livestock, and access for basic care.
Before you act, check the material label and whether both ends remain open for inspection. Compare the item with the rest of the setup and note any recent change that could affect what you are seeing.
A careful way to proceed
rinse the tube and test its placement before plants grow around it. Make one adjustment at a time and watch how the aquarium responds during normal observation.
Avoid using plumbing or craft tubing with unknown additives. Labels, products, and tank conditions differ, so use a reliable guide as context and record what you directly observe. If uncertainty remains, ask an experienced shrimp keeper before making a consequential change.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.