Tank size: 90l
pH: 7.2
ammonia: 0
nitrite: 0
nitrate: 60 (!)
kH: 40
gH: 100
tank temp: 25-26°
Fish Symptoms (include full description including lesion, color, location, fish behavior): no lesions, white with orange flecks, swimming at the surface, not being very sociable but moves down when I...