Turtle aquarium

Question
We inherited 2 turtles from a family that moved away and could not take them. I think they are red slider turtles, although the family said they were Reeves turtles. In any case they came with a broken light and a cracked cage (nothing is truly free). So, we bought a brand new HUGE aquarium for these little guys with the right light, habitat and filter system for turtles according to the pet store owner. But the very next day the water is cloudy. WHAT do we do? What did we do wrong? Please help! We want to be GOOD turtle owners!  

Answer
Red-ear sliders have red blotches or streaks behind the eyes and relatively smooth shells. Reeves have less coloration and a ridged shell.

Red-ears: http://www.austinsturtlepage.com/world_of_turtles/Red-eared_Sliders_-Trachemys_s...
Reeves: http://www.austinsturtlepage.com/world_of_turtles/Reeves_Turtles_-_Chinemys_reev...

Cloudy water is common with a new filter as the filter needs time to build a colony of active bacteria. Here is a good article on water quality: http://www.austinsturtlepage.com/Care/waterquality.htm#filtration

As far as the right care, http://www.austinsturtlepage.com has a huge section talking about heat, light, diet, etc. for a wide variety of turtles, and a great forum as well.