Will an old, dead sand dollar affect my aquarium?

[Ponyboy_icw]

Hey all, I'm new to the hobby and I picked up a few shells from a friend for my hermit crabs to take over as they grow, and she also gave me a couple small sand dollars from her collection.
I'm wondering if these will have any negative affect on my tank parameters if I put them in for decoration. They used to be alive obviously, but she has had these in a box for 15+ years.
Thanks in advance!

 

[andiesreef]

i've put shells from the sea in my aquarium all the time with no negative effects, so imo you should be just fine

 

[WVNed]

No it wont hurt a thing but they will probably grow stuff on them since there are some organics still inside them. A shell has no organics inside.

 

[Ponyboy_icw]

i've put shells from the sea in my aquarium all the time with no negative effects, so imo you should be just fine

Thank you!

 

[Ponyboy_icw]

No it wont hurt a thing but they will probably grow stuff on them since there are some organics still inside them. A shell has no organics inside.

Thanks!

 

[Timfish]

As endoliths burrow into them they'll be supplimenting alklinity, calcium and magnesium. So beneficial.

 

[Ponyboy_icw]

As endoliths burrow into them they'll be supplimenting alklinity, calcium and magnesium. So beneficial.

Thanks, I'll drop one in!