View Full Version : Sharpie highlighter fell in tank

08/15/2017, 06:43 PM
My nieces hand had sharpie highlighter on it and I noticed she stuck her hand in my saltwater fish tank. It started going everywhere in there and some started eating it. Is it safe could it kill them?:,(

08/15/2017, 07:46 PM
Sharpies are non-toxic when dry, but could have some harmful chemicals in before hand.

I'm going to say you might want to do a quick water change if possible. Perhaps some carbon may be in order. But I'm not an expert for trying to remove chemicals from a tank by any means.

You might get a better answer in a different forum. Perhaps the "New to the Hobby" section?

08/15/2017, 07:52 PM
Good reason for a big water change

08/15/2017, 08:45 PM

08/22/2017, 01:32 PM
The good news besides the obvious (possible) slight water pigmentation is there isn't much in a Sharpie chemically besides alcohol and die so carbon should easily do the trick.

08/22/2017, 07:06 PM
What's the update on this?