Hello there. If you can see my thread below this same sub-forum, I too am from Singapore. It appears that you have not read a care sheet. There is one here on frog forum, PLEASE read it.

Your new terrarium is too small. 20 gallons for one frog, 10 gallons for each consecutive one. Are your dimensions in cm or inches? I am assuming cm here.

Be sure to quarantine your frogs as you are doing now hopefully on moist paper towels, providing hides, climbing material.

These frogs are nocturnal, they are only active at night. They are not hamsters, and will not positively react to your touch. Frogs are "see no touch" pets. Read the care sheet.

Sphagnum moss is slightly acidic and can cause impaction if accidentally ingested. The latter is likely fatal. However, it has anti-bacterial and anti-fungal properties. If you feed the frogs off the sphagnum moss, they will likely be fine.

If you wish to use coco fiber, get a fine mixture. Frogs should be able to pass it out.