[melev]

It depends on what how you want to do it.

Usually I put the sand in first, then plastic on top, then a platter, then a pitcher, then I begin to fill it up with saltwater that pours into the pitcher, overflows onto the platter, then onto the plastic. Once the tank is half full, I carefully remove the pitcher, platter and plastic, and place LR in the tank. Then I add more saltwater.

Put some powerheads in that tank so the salt will get mixed up as it circulates through the system.

Once the saltwater is mixed up, your skimmer will create tiny bubbles that were mentioned above. You won't see them until the water is saline.