TSP isn’t the best, as it can leave a residue. The stuff for detergent is Sodium Tripolyphosphate (STPP). It can be ourchased from a number of suppliers like soapgoods.com or http://www.chemistrystore.com/cart.cgi?group=100513&child=100614
Are you using it? If so how much for laundry and dishwasher? Shipping is a killer for me but other than that it’s not that much more than TSP. I’m trying to find it local.
I notice it’s food grade and very non-toxic too.
Dittos to that. Got my first 5lb tub maybe 4 years ago, now working through my 10lb tub. No more white film on the top (bottom) of the glasses. 1tsp per load. Going to have a crack at the laundry with it today.