CHEZURAquarium decisions A film over the full hose length narrows effective bore and adds friction while the canister may look clean.
Use a non-metal flexible brush from both ends and do not force through removable valves.
Clean spray bars and glass outlets separately because small holes alter distribution.
Trim a deformed end only when length and instructions allow; seat to marks and use correct clamps.
Purge, dry the exterior and recheck for moisture.
| Situation | What to do | Why |
|---|---|---|
| Foam cleaning did not restore flow | Brush hose | Restriction is inline |
| Hose rigid or crazed | Replace to specification | Reduces failure risk |
| Wet connection | Stop and reseat | Treat as a leak |
After brush hose, measure or observe Foam cleaning did not restore flow again with the same method. Record Hardened or cracked hose is replacement, not cleaning. as well; if neither changes as expected, revisit the diagnosis before adding another intervention.
Sources include institutions, technical studies and manufacturers. Chezur separates established mechanisms from editorial decisions for home aquariums.