Might be a bit late but heres my set up ,
1 x wild color ( brown ) = 26 cm or about 10"
1 x albino ( gold ) = 21cm or about 8"
3ft tank with under gravel filter + small air driven corner filter ( they dont like strong currents )
large gravel ( so its less likely to be inhaled but can still happen)
and river stones
terracotta pots and
PVC pipes to hide in
pH is around 7.0 ( 6.5 - 7.5 is recommended )
my tank has no heater or cooler
max temp 24c about 75F ( check conversion - sorry from Australia )
min temp - dont let it freeze , they like cold and ive read it can help them heal if injured
FOOD = beef liver , worms ,(they will eat live fish , there are axolotl pellets available here but ive never tried them and a friend who studied biology told me they will eat turtle food )
Hope this helps