What Rocks/minerals Can't I Put In My Tank?

[guppy fan]

I have an amature rock collection and I would like to put some of my rocks/minerals in my tank, but I'm not sure if any of them will hurt my fish (guppies and cory cats). I'm not putting sharp ones in for obvious reasons. I sun pirite o.k? What about dolomite or olevien? What about calsified fossils and stones?

 

[Leitch]

I think you can do a vinigar test.

Pour some on the rock and if it fizzes then its harmful to fish.

 

[eschaton]

You seem like you know a fair amount about minerals, so instead of looking up rock by rock, I'll just say avoid any material which has calcium or copper in it. If I were you, I'd avoid anything which has phosphorus, or iron and other metals as well. Quartz and other silica-based rocks are ideal.

 

[The-Wolf]

rocks for use in the aquarium

 

[guppy fan]

Thanx.
Unfortunatly a lot of rocks I have I can't use, but there's always room for more in my collection.

 

[Luketendo]

Thanx.
Unfortunatly a lot of rocks I have I can't use, but there's always room for more in my collection.

I'm sure you'll be able to get hold of lots of nice Quartz.