PH 8-0 to 8.2
Nitrates, ammonia, nitrites, phosphates - 0 or pretty much unreadable
Calcium and Alk, 20g - 420 - 11 DKH, 16g - 380 - 9 or 10 DKH, 10g - don't have a clue because I haven't tested that tank for anything in months.
I also do water changes every week, 10% each tank. If I miss a week, which has happened once or twice, I can tell especially with the Xenia.
I started in September with 2 small pieces in my 10 gallon, one silver tipped and one brown
Silver tipped

Brown

Full Tank Shot
And This is what it looks like now, and I have trimmed them and given allot away and stocked my other tanks out of this tank.