Can anyone help

[Reddareefer]

Are any of these rocks no nos for a reef tank

 

[Flippers4pups]

Where did the rock come from? Some look questionable.

 

[Jason mack]

The red ones in the middle look like they could have iron in them ...??

 

[Reddareefer]

Where did the rock come from? Some look questionable.

LFS

 

[Coralsea_co]

It seems these rocks are igneous or metamorphic.
These rocks are not suitable for setting up a saltwater aquarium!

 

[Reddareefer]

It seems these rocks are igneous or metamorphic.
These rocks are not suitable for setting up a saltwater aquarium!

Which ones?

 

[Tuffyyyyy]

I'm hardly picky about my rocks, but I don't think I'd use any of those besides the purple ones.

 

[Flippers4pups]

The ones in the last picture especially. They look like they would go in a freshwater tank. Respectfully.

Any rock that is from ancient coral beds, aragonite based is suitable for reef/ saltwater tanks. Rock from granite, river rock.... may leach unwanted heavy metals into your tank.

 

[Coralsea_co]

Which ones?

All of them except purples