Hi all - This is slightly off topic, but I didn't know where else to put it....... I'm going to be curing some dry lava rock (never seen the ocean) just to get out any 'stuff' that may be living or growing on them. My question is this: can I use Sea Salt that is packaged at the grocery store (not deionized table salt!) instead of a synthetic mix - trying to save some $$... I know this wouldn't be good in the tank, but is it okay just for curing? Thanks for any input!