Air bubbles in dosing pump

[LittleBurger]

Recently observe this symptom in all my 3 channels.<br />Air bubbles in the intake and outlet silicon lines.<br />Does anyone encounter this n Anyway to solve it?<br />I tried draining out the fluid n manually start manual fill of the lines n it work fine. But After few days, issue comes bck.<br /><br />

[bhtteo]

which brand you are using?

[LittleBurger]

which brand you are using?

kamoer sold by madpetz. heard it is same as bubble magus.

Previously no such issue. After 1yr...