Cascade 300 hob question

[barend.labuschagne2]

It dear i why to get filtering in the Hob


Sent from my iPhone using Tapatalk

 

[fluttermoth]

I don't really understand your question. Could you write it a different way?

 

[barend.labuschagne2]

Sorry a my apologies so i have tetra filtering do i have to put it in the filter or is it not necessary


Sent from my iPhone using Tapatalk

 

[fluttermoth]

What have you got in the filter now? I don't know what the tetra filtering is! Is it a liquid? Or some thing like sponge?