what a eventful night.
First i look into sump as the return pump (eheim 5000) is making a weird/bad noise. Then i notice a spring leak in the return pump hose.
So i turn off return pump and then turn it back on to see if the noise will go away.... but it wont come on ...i try switching it on/off/on/off/on/off many times and nothing then later i try it again and it works but the hose bursts.
First i look into sump as the return pump (eheim 5000) is making a weird/bad noise. Then i notice a spring leak in the return pump hose.
So i turn off return pump and then turn it back on to see if the noise will go away.... but it wont come on ...i try switching it on/off/on/off/on/off many times and nothing then later i try it again and it works but the hose bursts.
So as there is no water flowing from display tank to sump and that means no skimming happening.
I will find a new return pipe hose (AS THE CADE ONE HAS FAILED AFTER 4 MONTHS!)
and get the eheim return pump replaced.