Okay, I have a 1.5g tank for Dr. Z. He's energetic, is always swimming to the front of the tank when he sees me enter the room. A lot of bubble nests everywhere so I know he is not stressed, etc., etc.,
Anyways, I've been doing 50% water changes with a light vacuuming of the substrate (for poop). The last one I did I waited a good 7 days (I know, bad me) but I was doing daily water tests and the results would be 0 - Ammonia, 0 - Nitrites, 5 - Nitrates. I have a filter that is baffled/air adjusted and live plants, plus a heater.
If these levels hold, would I even need to do water changes (I still will do the changes, because he would essentially be swimming in his own urine), but would I be able to get by with just weekly 50% water changes?