Welcome to AA!!
In my opinion a betta needs nothing less than a 5 gal
tank, and it's crucial that tank be heated, and preferably filtered. A 1 gal
vase would not make a proper home for any fish.
's should be stocked in groups, or at the very least a pair, and need no less than 5 gals, though 10 gals would be better.
Oto cats should be stocked in groups of 3 or more, and added to mature tanks of 15-20 gals or more. A 2.5 gal
simply cannot produce enough algae for an oto to live long term on, and they are typically wild caught fish that are tricky to supplement.
Vampire shrimp get huge, and at full size should be in a tank of about 55 gals or more. That guy will not last long in a tank so small. It should be supplemented with foods for filter feeding inverts such as OSI microfood, or a liquid phytoplankton/zooplankton.
You have a lot of stocking issues going on, but I think they are actually fairly easy to resolve...
My suggestion would be to get yourself a tank of 15-20 gals, and to it add your betta, oto, mystery snail, and the vampire shrimp. Hopefully the betta will get along with those guys. If not, he'll need his own 5 gal
tank. If so, you can let the tank mature for about 6 mos or so, and add another couple oto cats. You could also add something like a school of neon tetra to fill the tank out. Keep in mind, even in a tank this size, and even once it's matured, the vampire shrimp will need a lot of supplementation. Your best bet is to rehome the vampire shrimp, since it does not belong in a small tank.
A 2.5 gal
is an ideal shrimp tank, so then put the dwarf shrimp in there.
Then you can put the ADF
in the 5 gal
and get it a couple of buddies. Sex the frogs by checking for a bump under the armpit, the bump indicates they are male, and make sure you have either all one sex, or two females and one male. Heat their tank to 80F, and don't add any tankmates with them, since they are nearly blind and can be easily outcompeted for food. Be sure to feed your frogs only frog and tadpole bites and thawed frozen foods like bloodworms and brine shrimp. You can place their food in a feeding dish so they know where to find it and can eat efficiently w/o losing a bunch in the substrate and fouling up the tank.