These are just some of the stingrays I've hd over the last 3 years. The bigger pond is 100"across 20" deep, something like 650-750g i think. the smallest ray in th pond is about 16" without tail. the bigger ones 20-24". It looks more impressive in person and it was all DIY. The leopoldi rays, worth a fortune now, are like 10-13". the tank was 300g and was packed at points with the rarest of freshwater predators. My rays bred in captivity where I had pups that survived. i feel i did very well with freshwater and now hear I go with the reef sh*t. Thanks for looking. Any questions or comments feel free -mike