You posted this in the other forum (yes people, there are other forums out there ) while I was away Janet so by the time I read it you had had several replies so I didn't add my 2c worth there.
You have been very lucky so far. The best you can do is to keep up the regular water changes but a bit more than a bucket each time. Change 1/3.
Have you bought any test kits? Test pH, ammonia, nitrates and nitrites. This will tell you what is giong on in the tank and how far through the cycle it is.
I would not add another fighter with that mix of fish. In fact, I am a fan of fighters being in species only tanks but a lot of people keep them (successfully too) in community set-ups.In fact, do not add any more fish at all. Let the tank settle.
I know it's hard, but also stop taking in other people's stray fish! You don't know where they've been or what diseases they may harbour (harbour - fish joke :lol: )