What is the best way to treat saltwater rocks for a freshwater tank?

Question

I recently went to the beach, and founds lots of nice agates and sea shells - I'd like to put them in my freshwater tank, but I hear it's really important to wash/treat them first... what's the best way/how can I do this?

Answer 1

First off, you should really consider upgrading your tank size before you consider putting such large items in there.

Two and a half gallons is NOT large enough to hold the bioload of eight one inch sized tetras.

You really should have a ten gallon at minimum!