Why is my hob filter overflowing on the intake?

I have this hob amtra 370 filter and i have ''upgraded'' like this,because,as it works,the water pumped up flows from the first chamber to the 2nd one and out withoyt anything in the way.Water always chooses the easiest route,therefore the top water which is unfiltered ended up going out from the out take and i modified like this.I put a plastic devider,which snugs tight in place,so the water entering the 1st chamber has to move down,into the 2nd chamber up and out.So,o put some medium foam on the intake tube,to stop some debris,then i pit a block of coarse foam in the first chamber,then some filter floss and then my bio media(weighted for the litres i have).The filter at full power overflows as you can see from the intake chamber and everything is cleaned up very well(i clean weekly).What can i do?I consider the floss essential and i ve already taken some of the bio media off...What am i doing wrong?Any suggestions?

 

Make that plastic divider shorter than the external walls of the filter. Then the water would flow over it before it would flow over the filter walls. Or you could drill some holes through the divider at a lower level than the filter walls.

You need to provide a backup path for the water that isn't over the filter walls.

 

But if i shorten it,the water will bypass the sponge and bio media and will come out from the outake without being filtered.Normally there s no divider...

 

If you can push your biomedia down in the front tank, it will raise the water level in that tank and should help to compensate.

 

But if i shorten it,the water will bypass the sponge and bio media and will come out from the outake without being filtered.Normally there s no divider...

You could make the gap between the divider and the bottom of the filter larger. That would allow water to flow into the second chamber faster. Or you could reduce how much filter floss you are using.

Or instead of stacking your bio-media on top of the floss, maybe stack them side by side. The water will flow faster through the bio-media, and that could even things out.

One way or another you need to provide an easier path for the water to get to chamber 2.

 

From what i figured out,you cannot force water in those filters.They are not like canister filters or even internal ones,which are closed,and the water has to go through wherever you make it to.So i took the divider off,did a small modification,i compromised with the idea and it s a lot better now.