Your tanks like a good tank! If you can, and your tank allows, have some sort of cave areas where only the smallest fish will get in there. In my paludarium, I have rock work that hide the sponge filter which also becomes shrimp sanctuary. At night, all of them come out to feed.
With guppies, just make sure that they have hiding places so that they can escape. You might look into have some sort of Dwarf Sag carpet to cover up the bottom of the tank.
As for the Corydoras, I definetely wouldn't risk them unless your certain your FBTs won't attack them.
This talk of FBTs is making me want to get two of themMaybe I will but my Vampire Crabs would be very susceptable.
Basically, just take it slow and make sure you watch.
:headshake2: I thought my betta wouldn't go for my shrimp since I didn't see him but I don't see many shrimp anymore.
I am planning on a few pieces of driftwood stacked so that it offers a lot of hiding spots for small fish. Also, since I forgot to paint it, there is going to be a moss wall along the entire divider that will extend out onto the land. This will be a major fry saver along with helping the frogs in and out of the water.
About the dwarf sag, I have some from another tank all ready to go!
I think it's time for another tank so you can get some FBTs!
I'll take it slow once things start happening, I'm just that person that needs everything laid out WAY before I need it! Oh well, I justify it by saying there's nothing like planning ahead!
