So I was doing a WC today - normally weekly but I measured some ammonia in my water - just added a ray so might be the culprit.  In stirring the sand I found some of the black worms seem to be doing fine!  I guess the Ray or Geos will find a snack?  Usually if one of my canisters gets dirty, I'll see a drop in PH.  This week it seems to be climbing - from 6.5 on Saturday to 6.57 on Tuesday.   Any ideas?
Btw - I know Prazi is safe for rays. What about Cupramine?
				
			Btw - I know Prazi is safe for rays. What about Cupramine?