Can I use this rocks

[vibeke]

Hello. I'm starting a new aquarium where there should be Halocaridina rubra in.

Today I have been out to buy decorative material and found a Rock type is was great. When I got home there was lime dust in the bag and I tried to drip a little hydrochloric acid on the stones and it turns out that they contain lime. Can they still used my osmosis water with sea salt, or is it a bad idea when there is calcium?

[Stalker]

Yes I think

[Mech]

it will buffer your water nicely, and keep your water from becoming too acidic. just make sure there are no metals in the rock... not sure how you can test for it apart from looking it over.