Posted: Thu Jul 05, 2007 7:26 pm
Green algae isn't harmful, but it can be aesthetically unpleasing. My turtles have some carpeting the edges of their basking areas and on some of the objects (plastic plants mostly) in their tanks. The water is clear, however, and I like the look---it's more natural. I would not, however, want to look at green water...
I'm thinking that your turtle has no doubt grown in the last 3 years and is producing more waste, which increases the nutrient and phosphorus content, which along with heat and light encourages algae growth. Even though the tank has been in direct sunlight (not a good thing to do, especially in hot weather), I'd move it. I'd also do more frequent partial water changes to help keep down the nutrients and phosphorus in the water. See if those things help.
BTW, how big is the tank, how big is your turtle, what kind of filtration do you have and how often have you been changing the water and cleaning the tank?
A pic of those green scutes would be interesting to see...
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-