Ammonia 0, nitrites, 0, nitrate 10, ph 7.8 ish. The water change routine fits in with my everyday life that's the only reason I do it like this. I'm not losing any other fish just gouramis. Red robins. Yes it's cycled. Been set up for around 4 months. No there doesn't seem to be any correlation. I purchased 4 about month ago and lost the last one today. They seem to slow down and begin to flatten their fins. If that makes sense?!