Hmmm... I'm still not sure what the cause of the oil is. All I do is change 25-50% of the water in my turtle's tank(s) twice a week (using tap water treated with aqua safe), and replace the filter cartridge once a month. I also scrape algae and mineral deposits off of the sides and bottom with a razor blade when it builds up a bit and do occasional water changes in between if the water is more messy than normal. I've kept many different types of turtles for a long time this way and haven't had a problem yet. I would occasionally get an oil that sounds similar to what you're describing in an old snapping turtle tank but that was just because I didn't keep up on the partial water changes and would leave food in the water longer than I should have. Good luck and keep us posted.



-Joe-
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0.1.0 Colombian Red-tailed Boa (100% Het. for albino)

0.0.3 Western Hognose Snakes

0.1.0 Plains Garter Snakes

1.0.0 Red-sided Garter Snake

1.2.0 Barred Tiger Salamanders

0.0.1 Red-eared Slider

1.3.0 Mice

50 million Guppies

50 million Crickets

50 million Mealworms/Beetles

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