Dosing 4 part elements

[scott11106]

normally i would dose everything into the sump but since one of the the returns go partially through uv and the other return partially goes through GFO and carbon should i dose directly into the display ?

 

[Reeferdood]

normally i would dose everything into the sump but since one of the the returns go partially through uv and the other return partially goes through GFO and carbon should i dose directly into the display ?

Not necessary, GFO and Carbon don't remove elements nor does UV. At least in quantities you should be concerned with.