This is a remix of https://www.thingiverse.com/thing:6267303 basket.
This basket comes with 4 chambers and I made it 1mm smaller on X and Y axis for better fit.
To use 4 chambers, print 3 upper dividers and 1 bottom one.
I actually ended up using it as a 3 chamber basket.
Top chamber for a foam and floss,
second chamber is for activated carbon,
and bottom 2 chambers are used together as one big chamber for mix of ceramic bio balls and tubes.
Print it slow in PETG.
No supports.