After reading a thread on here about water quality reports (had no idea you could get such things!) I have just been looking on the Yorkshire Water website. They seem to imply that they use chlorine, not chloramine, but I've filled an online contact form to ask them about this. I also found the latest published water quality report for 2006-2007 which listed the following values:- Copper = 2mg/L Nitrate = 50mg/L Nitrite = 0.5mg/L Ammonium = 0.5mg/L Is the copper level in my supply water (2mg/L) likely to be harmful to my shrimp and/or MTS?? I have no idea what sort of levels are dangerous for them :?