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[FixIt]

I purchased life rock. I hear that it can leech phosphates into my tank. Is this correct? How do I combat this?

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[Drewbe147]

Cure the rock. Lots of posts on it. Theres a “sticky” thread near the top of this forum section called preparing rock. Should answer your questions in there.

 

[thegrun]

Before you go to the trouble of curing the rock, test the water to find out if you have a phosphate issue or not. If the rock is leaching a significant amount of phosphate it will show up in your test within 4-5 days. If you go a week without a sign of phosphate you don't need to cure the rock. Most live rock will not leach phosphate unless it was kept in a tank that had high phosphates.

 

[top shelf]

What thegrun said. Some rock, like pukani, is notorious for leeching phosphate. If you find it is leeching a lot you can dose lanthanum chloride to help speed up the process. It helps to precipitate the phosphate out faster and can then be removed with water changes. There is a lot of info about this topic that goes further in depth but that is the basic to it.