Bull frog tadpole care/questions

[Jacobsherps]

Hello all, i recently just got some bullfrog tadpoles and im wondering how to care for them. If there not bullfrog tadpoles let me know, i think they are though. I also have some questions
What do they eat and is fish food ok
How long until they become frogs.
Is this tank ok
Do they need a filter or air adder
Do they need water changes and how often .
What is good water temp range

Ive been feeding them strawberry tops and grass and one has small legs