just so you have your eyes fully open, if your SH are CB, mixing them with WC pipes (there are no CB pipes in the US commercially) may result in the CB SH getting sick, as besides being super prone to bacterial infections, many Syngnathids carry species-specific pathogens that the carrier is immune to, but not other Syngs. this is all compounded by the CB SH not really having any immunity to "WC" pathogens.
a lengthy QT for the pipes is in order if you attempt mixing. during that time, you can get the pipes trained to frozen if they aren't already eating it.
also, if you get more than one bluestripe pipe, you must be certain you have a M-F pair, as two M's will fight to the death.