Amazon.com: Black Happy Birthday Decorations for Men,Black Birthday Apistogramma Agassizii Double Red. Fish Size Guide: The 'Maximum Size' outlined below is the length this fish can reach as a full grown adult. For the actual size please use the select menu above. Discus. ae prefers younger stock for their better ability to adapt to new water parameters and higher tolerance against transport. On rare occasions you may receive larger specimens when small fish are unavailable, however the smallest should be expected unless the size is noted as "Large" or "Adult". Species Information: Scientific Name: Apistogramma agassizii Maximum Size: 3 inches Temperature: 22 C to 29 C pH Range: 6. 0 to 7. 0 Origin: South America Stendker Discus: Compatible Dwarf Shrimps: Non Compatible Notice: Live animals are not manufactured products, sizes may vary and colors will be faded upon delivery from transport. Shipping Policy and Terms & Conditions must be read before placing an order.