Hi guys. Apologies if this is a stupid question. I have a di vessel and my tds is 000. However I have just put about 100 litres into a new tank in my van, just to check that my fittings are water tight. My tds is reading between 007 and 011 from the tank. Do I just need to rinse the tank to bring the reading down, as clearly between the hose and the tank my water isn't pure? Thank you...