Good advice from zammo.
If the answer is no, or maybe...don't be afraid to experiment. It's interesting that you are having one on pop up and one on bottom baits. Generally choose one or other. If you don't have debris, weed, silt on the bottom there no need to have a pop up... They just look odd. by all means have something buoyant in the rig to make the bottom bait critically balanced...but don't have it floating three inches above the deck
Equally if you have all of the above, try a pop up to present over the top of it. But don't feel you need a pop up just because the mags say you should use a pop rig.
I re tied all of my rods today co incidentally ready for the spring period. I have one ready for maggots (supple braid) one ready for a balanced bait (flouro to braid combi) and a chod as a roving bait. The first two will be fished over bait and the chod will be a single that I cast at showing fish.
By May I will re tie them all again, as i change my approach as the water heats up.