Hi, What's the minimum required water for a big adult? If we want to use plastic instead of glass tank- do you have any recommendations on where to purchase it? TIA
10 gallons per inch of shell length. On average/minimum, a 55 gallon for a male RES, and a 90 gallon for a female. You want what's called an acrylic aquarium. Those you should check with local aquarium hobby shops for the nearest place to get them. Just be aware that they will cost a lot more than an equivalent glass tank.