You're better to buy a newer, higher efficiency ballast. You're not going to get much bang for your buck, or the light you want with a M57.
http://www.manhattanreefs.com/lighting
Checkout the charts and specs with different bulb and ballast combos. Interesting data for comparison.
But yes, in a nutshell M57 = Probe Start 175w MH, compatible bulb will work.
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28g Nano Cube drilled with 13g sump in stock stand. Vertex IN80 Skimmer, Phosban 150 Reactor, Apex Controller, DIY LED with stock hood, dimmable
Established March 2006
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