This is happening way faster than I had hoped, but the quick story is, in about an hour I am going to have brackish fish. Archers, a puffer, anebelips, an eel, and a violet goby. I have a 120 they can go in for now, just need help with the water.

Is mixing the saltwater this fast going to be a problem?

Would adding a ton of aeration and a super big water pump help lower risks?

am I overreacting?

Also I don't know the SG of their current setup, so I guess I should undershoot it rather than risk going over, correct?

Would drip acclimation be the best option for this or could I get away with just scooping in about a 1/2 cup of water every 30-45 minutes for a few hours?