Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Strange crusty, powerdy stuff appears on top of tank...?
It cleans off easily enough, but is comes back over time. Is this some sort of residue from water evaporation or is it something else?
5 Answers
- GuZZiZZitLv 51 decade agoFavorite Answer
They call that "salt creep". It's the result of hard water and disolved salts. There is a product available fro Foster and smith to eliminate it, bu i wouldn't bother, it dosn't hurt anything and it's easy to clean up. Here is a link anyway. http://www.drsfostersmith.com/product/prod_display...
- Anonymous1 decade ago
You have hard water, meaning that there are a lot of minerals disolved in the water. As it evaporates the minerals form that stuff.
It's pretty harmless, but I don't have any really sensitive fish.
I live in Sacramento California, and I have very hard water.
- How do you think about the answers? You can sign in to vote the answer.