Adding Carbon to skimmer line

[ecam]

I currently have 2 fish tanks that avg 7.7 PH due to basement tanks.
I just ran a 1" pVC pipe outside of the house into my fish room. Now i need to get that PVC pipe to my two skimmers located on opposite sides of the basement. My goal is to run carbon through a canister filter first and then split the line into the two tanks. The2 frag tank is right below the pipe so no big deal in terms of reduction. However the DT is about 20 ft away. If i reduce to 1/2 right away abd then run 20 ft to DT will i make my skimmer work to hard to get air and reduce its effciceny? Or will the reduction not matter? If i cant do that then I will have to run to carbon filters which seems like a waste. Any advice will be appreciated

 

[ecam]

bump

 

[twilliard]

Hard time visualizing this.
Are your skimmers hard piped or in sump?

 

[ecam]

Skimmers are not hard piped

 

[SeaDweller]

Why not run a CO2 scrubber to increase the pH? Won't that help you just as effectively?

 

[ecam]

I tried cdx in a canister filter. It didn't raise it past 7.8. Running since yesterday

 

[SeaDweller]

Dang that sucks!!!!