thanks for your replies, as for other stuff in the tank, all i have is a rock formation in order to allow them to stay out of the water underneath the light. No other animals, no plants, just gravel. The food im giving them doesnt smell nice, but i imagine its ok for turtle food, smells of a concoction of fish and stuff. I am actually thinking the filter isnt working properly, i just bought an eheim classic 300, which is supposed to be quite powerful. I have not changed the filtration system within it yet, as in it still has the foam pads that come with it, will that make a difference to its power ? Its been at me 2 weeks and im thinking of taking it back to the store today.