Yes, should be all right, NaOH is highly soluble, so even though it is a strong alkali it should all be gone.Could someone tell me whether empty sodium hypochlorite containers are suitable for storing water in for water changes? Well rinsed obviously.
@Simon Cole , thank-you, sorry sodium hypochlorite, not sodium hydroxide. @SRP3006 same applies but you don't need the vinegar, you just need to leaves the container outside for a couple of days in the sun after the final rinse, so that it is entirely dry.Na+ OCl– + H2O <——> H+ OCl– + Na+ OH– (NaOCl salt). @dw1305
No you are good.I'm guessing the vinegar won't have done any harm