I will tell you the same thing. I was on Asacol tablets( foam is milder than oral asacol) and maintained 2 years of remmission but then stoped it and flare is so bad that even on Prednisone for 6 weeks, I am not in full remmission. My next medication would be either immuran or ramicade. So if he is feeling good with foam, don't discontinue. It is the mildest medication for this condition.You don't want him to go on immuran or remicade unless it is absolutely necessary. So if you want him to help, make sure he takes his medication regularly. You can always add natural medicine with asacol.
You can always add probiotics and make sure he eats healthy.