explains

Apparently some Old World cichlids communicate by urinating. http://www.practicalfishkeeping.co.uk/content.php?sid=4666&utm_source=PFK_newsletter&utm_medium=email&utm_campaign=January_6_2012&utm_term=Cichlids_communicate_by_weeing&utm_content=html

So living in a somewhat rural area my water is supplied by a private well. I have always had nitrates in and around the 15-20+ range in my tanks no matter what I do (super sizing the bio filters, 50% wc 2x a week, etc). Somewhat puzzled I decided to have my well water tested. The nitrates in my...