All of my tanks have the same water ( makes it easier to maintain ) and now I have a problem, I have 1 pr of WC Breitbinden that are really acting listless cannot see the female but the male is either on the bottom in a corner just laying there or sometimes near the top in a corner. My water parameters are PH 6.5 to 7 no2 and no3 are okay my concern is general hardness according to the API test strips its above 180. I treated the tank with Catappa leaves and put some Carib Sea Amazon River solution?? What gets me every single tank and fish I have are doing fine except these and what is really odd they are in a 20 long and I have a divider in it on the other side have some triple reds and they are fine. If others were acting up okay there is a real issue but since its isolated to just one pr I am confused. Any ideas?