I made the mistake of buying my first regulator on Amazon for like $46. Not worth it. The rate was near impossible to keep consistent, you couldn't adjust the outlet pressure below 55, it had a small leak and because of that my 5lb bottle lasted 6 weeks on a 10 gallon tank.
Save that $50 or so and just pony up the extra up either buy a regulator from someone on the WTS section of the forum, or one of the greenleaf aquarium models.
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