Description Rio Negro Altum Angel (Pterophyllum altum) Origin: Wild Colombia Locale: Rio Negro near San Felipe Diet: Invertebrates, insects, frozen & prepared feeds Adult Size: 6″ Recommended Tank Size: 90 gallons Compatibility: Peaceful, can be aggressive toward conspecifics and may eat small fish 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.