im just giving the guy some info and telling him like it is. he asked about fish and turtles so i share my experience.
just like the guy with the goldfish that the turtle didnt touch, my girl completely ignores the cories. they were the first to be added...never been touched...tried other fish..it didnt work.
and you absolutley need to suppliment a turtle's diet with vitamins and fresh greens (depending on the species and their natural diet...some turltes are much more omnivorous than other species. age is also a factor in diet..young turtles require more protein than older turtles, esp. hatchlings. agreed about the UV lighting (uvb is the MOST important-over uva, anyway...important for proper shell growth and calcium absorbtion.). they make a "reptile dust" that you either soak for a few minutes with its pellets before adding them to the tank or sprinkle on some food that you've placed in the basking area for it to eat. if no suppliment is given all sorts of health issues may arise form shell rot, to eye infections to the dreaded upper respitory infections (which generally are VERY slow to heal) and you will certainly have one very sick turtle!
basking area also very important. must be big enough for the turtle to be completely out of the water. if they are not allowed to dry out, you may get shell rot, which is not something you (or your turtle) would be very happy to deal with. Heat lamps warm them up (they are afterall cold blooded) so it boosts metabolism. without a heat lamp, you will have A. a very sluggish turtle or b. a very sickly turtle, as immune system is directly related to temperature (ie metabolism). heated water also helps the immune system but is not necessary re: certain "northern" species (kinda like tropical vs "coldwater" fish.
and then there is flitration. turtles are amazingly dirty creatures. filthy messy eaters and produce lots of waste. do not buy a "turtle filter" they are JUNK!!! get a filter with a rating at LEAST 3x the volume of tankwater. and be prepared for lots of water changes and gravel vaccing!
there is my two cents.
if anyone is thinking about getting a turtle, please be advised that the cost of setting up a proper "habitat" (and i use this term losely) is absulutely not cheap. a good bulb and fixture will run you around 60$ at least and then the filter, and the tank, and the food, and the heatlamp, and a timer for you lights, and a BIG TANK (they grow soooooooooooooooo fast so the cute little hatchling may well be 5 inches in a year-think aobut that)...they are by no means "easy to care for" and can live up to 30+years with proper care...just be prepared for the commitment is all. loads of work but very, very interesting "pets".
cheers