Well just got a water filter for the hose pipe , so no more water marks after washing the car :D
Was £100 all in pre filled with the filter stuff inside , works out a £45 to renew the filter contents.
Good sales pitch to the boss also good to clean the house windows without marks :B_thumb:
http://i1168.photobucket.com/albums/...pstxrxpqbo.jpg
Also got a small bore hose pipe so won't waste filter water when finished.
Also got this TDS meter of eBay for £4
The house water is quite good looking at this meter.
http://i1168.photobucket.com/albums/...ps6wdfojoh.jpg
With this low reading the water filter should last a fair bit longer than a real hard water area.