two phosban 150's which first?

[wfo115]

I just installed two phosban 150's one for phosban and one for carbon. I have them hooked up to the same pump in line with each other. Should it go through the carbon first then the phosban or vice versa? Thanks

 

[muggiwhplar]

Put the Phosban reactor first. If you do it the other way around, some of the carbon's removal capability is wasted removing phosphates that should be handled by the Phosban.