Jacob, you didn't change the tone of the thread, it had no tone.
Over the years I think I did a few things that most people think is odd for some reason. To me my tank is supposed to be like a part of a reef or at least a part of the sea so I add whatever I find in the sea that I feel will either enhance the feeling or at least be interesting. We all know what a real reef is supposed to look like but if you see enough of them you may get bored. Thats why I add some things that I feel "enhance" it.
After so many years I have had every coral, fish and aquascape and I don't want to get bored so whenever I am at the sea, which is almost every day in the summer, I search tide pools and drag my net through the shallow water. Besides shrimp I find bottles, crabs, snails, cans, chains and various flotsam and jetsom that I find interesting. Much of it of course I can't put in the tank but if I feel I can coat it in some type of acrylic resin or if I think it can live in the tank, I take it home. I don't take anymore hermit crabs or horseshoe crabs because I know they will not live, but snails, shrimp and codium seaweed I bring home. Codium is cool seaweed and is very common on the east end of Long Island where I live. The stuff lives about 5 months in a tropical tank.
The local mud snails and shrimp live forever and are free. I can collect enough snails to fill a 50 gallon bucket easily and I can collect enough shrimp in 5 minutes to fill a 5 gallon bucket, with no water, just shrimp.
I also collect tiny anemones and amphipods.
Those things are just for interest but the most important thing IMO is bacteria. I collect a little mud every time I go just for the bacterial diversity. Is it needed?
I have no Idea. Is it good for the tank? I have no clue. But to me it seems to work.
I don't know of anyone else who does that, but it is what it is.
1/4" rock anemone
Rock crab (very cool)
Grass shrimp. (even cooler)
Old bald guy collecting in a tide pool