zebra plecos with mollies?

[Hybridfish7]

asking for a friend with a wacky idea, only problem i see with this is salinity, since i know plecos don't take too well to salt
but i wanna hear other peoples' thoughts on the topic

 

[Rocksor]

If your friend has hard water then mollies should be fine (not sure about the zebra plecos). You don't need salt for mollies.