Not having a filter isn't the point i'm making. Please scroll up and read our previous conversation. The information to help your situation is there
I've only offered advice from knowledge and experience which you have asked for, I cannot force anybody to be receptive. I can understand that this hobby is very expensive which is why the suggestions I have made are the cheapest aswell as best for the fish. Remember that fish being stressed isn't something you can spot right away and it can cause deterioration over time, they can't verbally communicate with us to tell us if they're 'happy or not.