Boston_Zhao wrote:i know each inch requires 10 gallons of water, bu I dont understand, why 4 one inch RES need 40 galons of water instead of ten gallons. I have 3 one inch RES, and the tank is 15 gallons, with 10 gallons of water, the space seems adequate to them, they dont bother each other
1" turtle = 10 gallons of water
1" x 4 turtles = 4" of turtles
4" of turtles x 10 gallons of water = 40 gallons of water
You'll need a 55 gallon tank, filled with at least 40 gallons of water to house 4 one inch turts. This size will only last a small amount of time, so as stated above by cam722, the bigger you can afford to go now, the more $ it will save you later.
Most new turtle owners think (as I did) that turtles are social and love each other's company, the more turts the better. This is because we always see multiple turts in the wild in ponds etc. But, most ponds are big, and can accomodate those turtles, unlike our captive habitats.
It's a lot of work to correctly house 4 turtles, but if you do your research and a lot of shopping around, it is possible, and very rewarding.
Check these sites for give-aways or cheap habitats/accessories:
www.freecycle.org and
www.craigslist.com
Let us know if you have any more questions. Good luck and keep us updated on your progress! Also, we love pics!