Graby (My Spanish Ribbed Newt / Ma Pleurodeles waltii) and her tank

My female Pleurodeles waltii is still happy in her 80x40x50 tank (160liters). Lot of live plants, white sand (To avoid impaction). Light is made with 2x24W T5 neon. Recently my water was not clear as usual. I added a pump (By avoiding to create so much trouble in water because those newts like quiet waters) and I decreased the lighting ratio from day/night from 12h/12h to 10h/14h. It seems that it solved the issue because the water has become clear again. Also, she had skin problems during spring and summer (White points on the body, too much sheds), probably due to high temperatures (Above 21°C). Now, the temperature decreased to 18°C to 20°C and she seems not to have anymore skin problems (To be followed). She eats 1 to 2 nightcrawlers per week.
Sometimes I feed her with red runner roaches, little locusts and crickets.