Stop feeding ACF freeze dried foods. You can feed thawed frozen foods, pellets (if frog will take them), or live foods (black worms or chopped night crawlers). Water conditions are important with them and if bad it can affect the frog's growth.
If you have a seasoned filter with good bacteria growth can change 25% water weekly; but if no filter need to do 25-50% daily water change with same temperature dechlorinated tap depending on tank and frog size. Good luck!