can i use this mod on the phosban for bio pellets on rowaphos?

[chercm]

anyone can advice ? my tumbling on the rowaphos have been very uneven though i have remove the sponge at the bottom . any one can advice ? i will not be using such high flow other wise the rowa will come out of the reactor .

https://www.youtube.com/watch?v=Kh7LZExaMrA