Hi guys! I have never actually set up a huge 150 gallon fish tank before. The biggest I have ever done was a 60 gallon breeder tank for guppies (I am a professional fish breeder). Other then that, I only have a few display tanks that are 20 gal and some 10 or 5 gallon tanks in my house and such. I am setting up my own PERSONAL tropical fish tank and I am wondering if you should add all the fish at once or just add in a few neon tetras at a time.