Need a better description... but they sound like springtails. They could also be mites. Are they round or elongated? It probably does not matter much what they are, if they are small and palatable the frogs will eat them.
Whoever told you springtails don't live in the Philippines was mistaken. They live almost everywhere on earth, pole to pole.
Whoever told you springtails don't live in the Philippines was mistaken. They live almost everywhere on earth, pole to pole.