Can you please check if I am caring for her correctly?

[ks5975]

Hi there, I have an african clawed frog named Derp (haha). Due to her bump on her bottom, I assume she is female. She is 3-5 in approx. I have her in a 20 gallon long bare bottom tank. Her water is in the high 60s generally. She has a bushy fake silk plant and a pvc pipe hide. I have a whisper 10 that I use sometimes. I feed her earthworms, waxworms, and occasionally different types of pellets. She is fed every few days. Does this sound alright? Do you think it is better to go with or without the filter? Would I be safe in adding a similar sized albino clawed frog? Please let me know any concerns, tips, or suggestions you may have! Thank you!