Return pump blowing out white particles

[CrazyFish]

My return and internal pump sometime blow out white particles, now my tank is full of white tiny particles, anyone know what isit ?

[shoelevy]

your return pump intake is exposed to air?

if it is it'll suck air and blow out bubbles

[CrazyFish]

Nope, pump fully submerged under water. The white particles are not air bubbles, is like dust particles. Wander if it got anything to do with tap water that I top up.

[hammer99]

Does it still to the wallof your tank ?

[huiwen]

It could be some calcium deposit that has accumilated in the pump...

[junyong84]

[blueheaven]

Not only calcium deposits, you may not know what you are precipitating

[CrazyFish]

I just found out the cause of the problem. Shoelevy was right, is the air bubbles. Although my pump is fully submerged in water, the water flow from my 2nd compartment of the sum create some air bubbles near the return pump inlet hence causing the white particles which is actually very tiny air bubbles. Thanks guy.