My fired bellied toad is bloated

[Mentat]

How is the frog and bloating doing? From your answers it's hard to pinpoint a cause since there are a few problems to correct. If frog is still bloated, get some Epsom Salts and prepare a 1 gallon dechlorinated water solution with 1 teaspoon Epsom Salt. Use that in the enclosure for a day and let us know if there are any improvements.

OK, think the first thing to do is for you to read this excellent care article: Frog Forum - Fire-Bellied Toad Care and Breeding - Bombina orientalis and relatives and follow it's advice. Since you don't have a filter in there, 50% daily same temperature dechlorinated water changes is the norm to keep toxic ammonia levels down. After you read article do get a larger enclosure for it where it's possible to control it's parameters and use at least a small air powered foam filter to keep ammonia and nitrites down.

That gravel is an impaction risk should the frog accidentally ingest some while grabbing a cricket. In a larger tank could use a small glass dish or bowl to feed crickets in. Also, dust crickets with CA/D3 2X and vitamins 1X weekly on different days with skip days in between. The glass bowl will keep crickets from jumping out and getting dust washed off. Good luck!

[Classpi]

Thank you for the advice! He is still bloated and not eating ever since he was bloating, but when I cleaned his cage he turned normal, so maybe he's just shedding?
We actually have Epsom Salt, so when I get the bigger tank, which I hope I can get that tomorrow, I'll add the salt to his water and hopefully I can get a filter. Now, would it be okay if I get larger pebbles? Ones that are too big for him to acciedently eat?
Or something else that would be easy
to clean?

[Mentat]

... Now, would it be okay if I get larger pebbles? Ones that are too big for him to acciedently eat? Or something else that would be easy
to clean?

Glad bloating went away! Pebbles to large to eat are fine. Would not add a thick layer because dirt will get between them and will be harder to clean with gravel cleaner or similar.