I put bk 160 in my fiend's 400L sps tank.
it still doesn't work well .
this is bk160 in my fiend's 400L sps tank
https://www.youtube.com/watch?v=aPzaHy2fUR0
and this is another skimmer in the same tank.
Now , I really need another answer for the situation.
this is bk160 in my tank
https://www.youtube.com/watch?v=x1S0aZWs2XM