That's a big tank! I think they would do OK together but if it was me I would start out with smaller specimens. The muds are a little more terrestrial than the musks so you would need to have alot of sticks or wood where they can get up to the surface easily.
You would need some really good filtration and I'm sure others would set you straight on that. I have a few musks in a 40 gal and they get that pretty dirty even with two fluval underwater filters, but a 40 is alot smaller than a 150.
Good Luck

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