I found this infomation hope it helps:
Common name
- Reticulated Stingray, Teacup Stingray
Scientific Name- Potamotrygon Reticulata
Native geographical area- Amazon Basin, South America
Native habitat- murky streams and rivers with sandy or muddy bottoms and submerged vegetation.
Maximum Size- 12-14 inches in disk diameter (this does not include the length of the tail!)
Minimum Aquarium Size-125 gallons, 72”x18”x24”
Diet- most meaty foods such as black worms (my ray‘s favorite), bloodworms, earth worms,
krill, beef heart, even live feeders or any fish small enough to fit in it’s mouth.
Tank zone- bottom dwellers
Temperament & compatibility- teacup stingrays tend to be very peaceful and will usually ignore other fish in the aquarium (aside from eating very small fish). Males, however, can become aggressive towards other rays and when it is spawning time, the male will bite the female’s disk as a part of courtship.
Hardness range-soft water (less than 10 DH)
pH range- around 6-7 is usually optimal
Temperature range- 78-82 degrees F
Notable sensitivities- burns: stingrays are very sensitive and even a slight touch of a heater can cause a burn. make sure to buy a heater cover or place the heater elsewhere such as a
sump if that is being used.
Hardiness- teacup stingrays are fairly hardy for freshwater stingrays, but are not for beginning hobbyists.