The problem you had with Colonix is common. Some people just do not do well with psyllium and constipation, bloat and gas is a common side effect from that. Oxypowder is completely different, it creates oxygen in the colon and liquifies it and everything comes out smoothly. And not even like diahreah.
Get it out of your head that you need specific *herbs* to cleanse. You really don't. There's quite a few people on here using Oxypowder and we've all had great results with it. Rarely any complaints with it, yet Colonix has quite a few of them. Spend a few hours searching this forum and you'll see for yourself.
You should send your Colonix back since it's 100% Money Back Guarantee and spend that money on Oxypowder. :P