My household gave up on saving shower water to flush the toilet after a couple of weeks.
That's cool. When you say you gave up, I assume this wasn't a whole redo of the house's plumbing, you just had a bucket in the shower or something that you then poured into the toilet's tank?
Would be neat to design a house to divert shower and sink grey water to toilets in an off-grid permaculture way.
Cue Western "ebil chineez diztopea" articles in 3, 2, 1...