sadly they stopped eating, found out the store had not acclimated them properly prior to sale or had them feeding. so they wasted away.
This is a shame, when you say they stopped feeding, did you ever see them feed? Not trying to string you up here, but if these fish are feeding they're normally very hardy (with good housekeeping). You had 10 too; so for 10 fish to stop feeding seems crazy to me. Could they have been intimidated by the tank mates? as they are timid and slow eaters, even slower than my badis.
For future freshwater pipefish keepers these fish should have been in a species tank and shouldn't have bought them without seeming them eat.