[UPDATE]

Gathered more data and did a very simple processing.  Very simple noise reduction.

I had a lot of problem capturing the Tulip Nebula because of some issues with probably my mount, my alignment, my guider or simple because of the weather.  It was very windy in the past few days and couldn’t control.  Anyway, I tossed half of my data worth around 5 hours of exposure.

Also I replaced my Orion OIII Filter and used an Astronomik OIII 12nm CCD Filter.  It looked better than the Orion as it is causing same halo on my images.