Indiana Rent Increase Limits?

[Mark Aiken]

Is there a limit for how much you can increase a tenants rent in Indiana?  I purchased two properties with inherited tenants who have been paying rent well below the market rate.  I will honor their current rental agreements but plan on increasing rent as much as 70% (owner was paying utilities too) with the next agreement.  I believe I only have to give 1 months notice, but I haven't seen anything that limits how much you can increase rent.