Wow, that's a lot of work.
Sera super peat did not turn my water yellow. Plus i use purigen so there are usually clear.
I'm super lazy so RO machine been good for me.
Yeah, it's some work but a ball lasts 5 to 10 WCs for me so it's not too bad when I didn't have a RO system and my back refuses to carry anything heavy from the supermaket, and it has been working well for me.