Description Rio Negro Heckel Discus (Symphysodon discus) Origin: Wild Brazil Locale: Middle Rio Negro near Barcelos Diet: Insectivore in the wild. Will accept most frozen and prepared foods Adult Size: 6″ Recommended Tank Size: 60 gallons Compatibility: Generally peaceful toward tankmates, may become territorial with other discus Preferred Water Parameters pH:                          6.0 – 7.0 Temp:                     78-84F Ammonia:              0ppm Nitrite:                    0ppm Nitrate:                  <30ppm Shipping Note: Due to size, the need for extra packing, and space requirements, larger sizes may not be eligible for our flat rate shipping. We strongly recommend shipping via air cargo when possible. Please contact us for a quote or for additional shipping info.