Does anyone have CPR Bac PAc with their own mod?

[FishAreFriends2]

I have been using one for a while and it doesnt seem to get me dark skimate, I know about the extra air pump thing but is there anothing way to make it more affective?

[Andrew]

Keep in mind just because your skimmer isn't producing dark skimmate like you may see in other pictures doesn't mean it's not working right. The amount of skimmate and the color will vary as tanks have different bio-loads. :)

[Agu]

After trying several mods I found the Bakpak worked best as it came out of the box.