hi there,just joined here Been trad window cleaning for about 3 yrs and recently decided to change to WFP, invested in a trolley system,have water containers , 5l of mixed bed resin and TDS meter. i was under the impression it would be as simple as mixing resin with tap water and away you go lol i was wondering if anyone would be kind enough to give me some advice on the water purifing process?? as i say i have 5l of mixed bed resin to be going on with,does it mater what size di vessel you have can you half fill them with resin and get results?? i have tested a cup of water and my TDS reading says its 86 ppm i understand this is low enough to not require a RO unit is that right?? would i be best buying a small di vessel to get going?...any advice would be welcome as i've taken on a few extra customers and i'm hoping to keep them going and not lose them.....thanks guys.