I drained the system yesterday, and I tok a picture
(sorry for the large size)
As you see, the hose is a little brown...
I belive the hose has taken up some of the chemicals from the WW. The hose would eventualy become stiff and would have started leaking if I had bendt it much (atleast thats what the sales-man said)
The watter was a just little green, not much diffrence from normal watter, so I think the WW have done it's job.
By tha way, I was forced to blow the watter out of the system, shoulden't it have come out by it's own when I opned the ventils after placing one hose over and one under the system? (Having the two T-s)