"I was just reminded about X. I hope you've taken care of that." sounds kind of patronizing to me.
"I was reminded about X and I thought I'd remind you too in case you haven't taken care of it yet " ??
Or what broke said " I was reminded about X in case you still need to take care of it."
(PS I feel really pathetic that I can't even figure out how to word a simple text...)
M:26 H:32 T:8yrs ILYBNILWY/ "I'm not happy": 2/6/16 D-Day-discovered PA/EA: 2/10/16 Separated: 2/14/16 He's living with OW I moved to different state: 06/16 Currently: Trying to move forward