Using Rocks from african cichlid tank.

[cs_sg]

Hello,

I have a few big pieces of rocks which I have been using for the african cichlid tank.

I can't put a name to the type of rock.
Here's a pic of them.

Can someone help to identify what rocks they are?
I've numbered them differently as they are all different rocks.

I have used them in my African cichlids tank for 2years, with crushed corals.

Is it okay to use them for my planted tank if I rinse them?

[cs_sg]

Anyone knows if I can use these rocks for a planted tank since it has been in a tank with crushed corals bed for 2 years.

[|squee|]

They look to me like they can leech out stuff. Besides, frankly they aren't really nice-looking. Imho of course.

[cs_sg]

They look to me like they can leech out stuff. Besides, frankly they aren't really nice-looking. Imho of course.

I was thinking if it would leech too, but more if they would alter the ph of the water.

Well, I love these rocks :P and there are a few other smaller pieces of same type. I hope to compliment them with moss and Java ferns.

[alanyeo99]

The rocks are likely to be of volcanic origin. They are porus, can trap chemicals, and slowly leech out over time.