What?!? Here I can get a full in-vitro cup of 'Mini needle leaf' or 'Lamandau Mini Red' for 5 bucks each.
I've been keeping receipts so that someday, assuming I can ever really be "done" with plant stocking, I can tally it up and then decide whether or not I want to jump off a cliff.

Lamandau mini was $14.99 (on sale) or roughly 12 euro so yeah, they cost almost 3 times as much here. And you can pay much more than that for other varieties! I also never buy just one since they're so small. Out of all the plants I've murdered so far buces are the only ones actively trying to do the same to me!
https://www.thorntonco.gov/media/file/water-quality-report
That links to a pdf if you want to see the entire report. Nothing looks out of the ordinary to me but maybe you'll spot something detrimental to buce. Magnesium is listed at 11-21ppm and nitrates in the tank are 40ppm. As for fish there's just neons and CPDs, along with amano and neo shrimp. I keep a few catappa leaves in there for the latter but it's not enough to discolor the water-unless the purigen is removing the tannins.
You mentioned pulling the bio-fx; I can certainly do that, I have various types of bio media lying around I can swap it with. The only reason I'm using it is because the box was damaged so I was able to get it cheap! The easiest to get to would be a bag of K2, or if I dig a little I'm sure I can find regular old ceramic rings. What's the reasoning behind making the change?
I think I mentioned before that all new plants go into this tank first since it's well established, with the idea being that once acclimated I can move them to other tanks that aren't quite as mature. Probably a bad idea, but since they're not surviving, I haven't been able to test it.
Edited to add: I made a mistake listing filter content. I must have had matrix on the brain for some reason but I meant Purigen.