Old way to cook
Get some butter, eggs, flour, salt, sugar, baking powder, milk, vanilla and mix it up. cook it in the iron.
Makes tasty waffles
New way to cook.
Get some stuff in a box. Mix in some liquid. Cook in the iron
Makes things that look like tasty waffles but taste like biscuits, pancakes or anything else you could make from the stuff in the box. Doesn't taste bad at least.
Old way to reef
Put a piece of shrimp or a small fish in a tank with saltwater and some rocks that have come from the sea.
Wait with great anticipation and your tank will get going slowly as you add one or 2 new things each week. Some things that were on the rocks will already be in the tank and be exciting to watch. You are hooked and have a cool lifetime hobby.
New way to reef.
Put saltwater in tank. Add bottle A and 35 drops of bottle B. Wait. You can see nothing happening. Add more. Still nothing happening. Wait with great angst. Guy at LFS says it's all good. Buy $562 worth of animals from guy. Wait. Almost all of them die. Cry on internet. Get condolences from people that did same thing.
The things that died act like the piece of shrimp you could have started with and there was enough bacterial diversity on the corpses that the tank finally starts. Try again or quit. Okay try again but be forever cautious and unable to trust the tank.