Hi all, i am now thinking about the fitration for the 500g tank i am near ready to start building, i am going to build my own sump but i also have this lying sbout
It was used on a Koi pond and as i am not doing one know i was wondering if it would be any use in the filter system somewhere, i will be running a 3500gph pump and was thinking of using this if any use.
If it is any use what should i do with it, i was thinking of after the sump to polish the water maybe..

It was used on a Koi pond and as i am not doing one know i was wondering if it would be any use in the filter system somewhere, i will be running a 3500gph pump and was thinking of using this if any use.
If it is any use what should i do with it, i was thinking of after the sump to polish the water maybe..
