I had got some geos from the club two three months ago everything was fine till this past week. they are dieing at a fast rate i have lost 7 in past three days. water ph 7. softwater , nitrates 20 amonia and nitrite 0 the only thing that has change i added a pleco, bought it 3 weeks ago and added a drift wood from another tank I have found some symtoms red gills fast breathing noticed some scratching I have added a maracide and a phosphate pad just in case. and i use reverse osmosiss water any clues what could be the problem?
