Sanford Laundry Markers - Safe To Use In Water Change Bucket?

Nemo the Clownfish

I need something to mark off .25 of my tank to make it easier to do water changes. But first, I need to know if these laundry markers are safe. Thanks.

Tazman

Anything is safe as long as you mark the outside of the bucket only. A simple piece of tape cut to the level you need is also a solution.

I have a whiteout mark on the side of my bucket. Failing that, you can also use a small amount of nail polish to mark a line as well.