Here are pics of the BK300.
Hard to get a shot inside the cup as it is under a tank.
As you can see it is taking lots of crap out, 1 weeks worth.
This is the difference between mediocre skimmers like via aua, weipro.
Can’t really see how these skimmers are good value when they hardly take anything out,
Only benefits of these skimmer is that you might get the feel good factor because your did not spend much money by that is about it.
Any skimmer will skim something but cheap skimmers will take a very long time to remove anything so organics will build up so they will never catch up and the waste will keep building.
If budget is a problem then it is best to get an air stone skimmer as they will take out far more and at least they will be doing something.