I have been in complete remission from my CD since 2007 and all I take is pentassa and I follow the SCD diet. I have not had a flare or a fistula or a sympton since being on the SCD diet. My colonoscopy last year showed no active CD anywhere in my colon.
I suggest reading the book "breaking the vicious cycle" which describes the SCD diet. This diet isn't for everyone, and it is not an overnight fix. It takes a lot of work and 3 to 6 months of fanatical dedication before you start seeing results, but you never know until you try. It has worked for a lot of people on this site, and agian, it has not worked for a lot of people also, but you won't know until you give it a try. At the least, just read the book.