This question is actually for a brackish tank setup but it would apply to any tank that needs salt. My question is how do I go about actually mixing up the saltwater? Do I just mix the appropriate amount of salt with a bit of water and then pour in? Do I really need to aerate the mixture for 24 hours before adding? What about water changes? I've seen on youtube that I need to premix the stuff in a bucket and then aerate it and I would do that if the tank had some sensitive SW fish but does this apply to a brackish puffer and some ramshorn snails too?