Hi, I have a planted 10 gallon with 1 honey gourami, 5 Rasbora, and 3 oto. I also have drift wood and an artificial rock. Fish are Behaving healthy. The filter is a whisper 20. I followed the whisper instructions and changed the bag after 1 month, only to learn that was a bad idea. I’m now using an API test kit and have found my ammonia and nitrite is between .25 and .5, and nitrate is between 0 and 5. Ph is 7.8 with hard water. I’m doing 10% PWC every other day. Is there any recommendations for getting the ammonia and nitrite to 0 and nitrate to 5+. Or should I just continue 10% PWC every other day?