Eheim 2213 & flow rates question

[Peter1000000]

Hi, I have an Eheim 2213 external filter and the standard Juwel filter in my rio180. I think the Eheim is supposed to be 400 l/ph, but that would imply it would fill a pint glass in about 5 seconds. I think the flow on mine might be a quarter that level at best. It's also making the occasional "clackety" sound. I have it about half full of that ceramic media (effitech? or something like that), then one "scrubber", a coarse blue sponge and then one of the white "wool" filters (in that order from the bottom). I'm guessing something needs to be replaced or I need to remove some media. I have the filter outputting into the Juwel filter box. Any ideas on how to improve things? More expense may result in divorce!!

 

[LondonDragon]

First of all that filter is not really adequate for a tank that size, you woul be looking at something with a flow rate of 1200lph+, ideal two 1200lph filters.
The you make a huge error by placing the output flow inside the Juwel internal totally eliminating any extra flow in the tank. It would be best if you place this on a spray bar at least.
Failing the two filter option you could always purchased a couple of powerheads for circulation as the filtration would be enough for the tank, you are just lacking flow at the moment. A couple of Koralia 2 pumps would do the job.