A little while ago, I was sent a sample of BioZet washing powder to review (thanks, Karina!). It’s made to suit grey-water systems, since it’s low in sodium and phosphorus. Karina also sent me some info about grey-water, which was handy since I didn’t know much about it before. I gave the BioZet a go this weekend, doing two loads of laundry: one of mine, and one of Dave’s. Well, Dave did his own,...