CHEZURAquarium decisions A short burst after service can be normal. Persistent bubbles mean air is entering or gas is forming in the circuit.
Immediate fading bubbles suggest residual air; rhythmic or continuous bubbles suggest entry.
A near-surface intake can vortex, while clogged foam lowers local pressure.
Reseat dry connections, raise level and remove kinks. Purge only as instructed.
A gravel-like rotor sound requires shutdown.
| Situation | What to do | Why |
|---|---|---|
| Only after service | Purge and observe | Residual air |
| Continuous bubbles | Inspect suction side | Air can enter without water loss |
| Visible intake vortex | Raise level or lower intake | Stops air draw |
After purge and observe, measure or observe Only after service again with the same method. Record Cavitation reduces flow and can damage. 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.