radiator flush

I am thinking about flushing out the radiator on my '97. Is it safe to use one of those flush fluids (like prestone flush/radiator clean). My resevoir(sp?) has some sludge looking stuff around the top area and I would like to cllean it out. I have read that a simple garden hose works well to flush it out, but I dont know how an additive would react to a radiator with plastic tanks on it like ours. Will it hurt or harm the system?
Thanks in advance!
:rolleyes:

yeah I would just use a garden hose, and you can take the resevoir out and clean it too. thats what I did when I changed my radiator, but never put any type of sealant in your coolant system that resevoir just gets reallly dirty.

Don't forget the 3 pellets when doing a flush. That is an aluminum engine and needs those. Most good parts store will carry them. Like bears leak powder only in pellet form.