Acro issues

[ganjero]

My acros have lost color (brown) and some STNed in the past three months. I haven't changed anything in my tank other than adding a new trash can (Rinsed with RO/DI) for water/kalk top off (which I was doing from another container).

I have monitor my parmeters and they have not changed, I'm having a hard time finding whta's affecting my acros and also my zoas don't fully open.

My montis, plating (purple, orange, and green) superman, sunset, incredible hulk, digitatas are all doing fine with really nice colors.

Ph 8-8.2
Cal 400-420
Alk ~8
Salinity 35
PO4 undetectable by salifert
NO3 5-10


I just found something about brute posted by Eric Borneman cans but after researching Randy Holmes explained the issue better and brute cans should be ok.

I'm still planing on cleaning the can (and the other, I have two) again with vinegar since the issue seem to have started since I added it.

Any other ideas/comments?

Thanks