
Just curious about everyone's setup

OK, so I have a 5 gallon tank that's going through some major trouble now, but thank goodness it seems I am getting the situation under control and everyone is finally doing well.
That tank has a lava rock cave, a chaetamorpha from the reef store, a marimo Moss ball, A Moss ball from Mustafa, probably around 120-150 opae, not sure how many Mts, as they started reproducing, 2 nerite snails (one zebra and one black racer), and a Dwarf Hawaiian hermit crab. It has a HOB filter at the moment with purigen and chemi pure elite, but once the current problem is solved the filter will be removed. I also have a cuttlebone piece as I don't have any corals in the tank.
I am also cycling a second tank, a 10 gallon tank, it's been cycling for a month. In it I have 10 MTS snails 8 giant Marimo balls, one chaetamorpha. I have a sponge filter running that was from another tank and will be turned off once I add the Shrimp. A pile of lava rocks forming a small cave, a large coral.
This tank will have Opae and MTS only, and my plan is to not feed if at all possible. It will not be filtered either.
Now you guys, what is your set up like, and what lives in your tank?