im new with bp but my male yawns alot and i have seen him drinking twice now,i have only had him 3 weeks,im not worried about ri in mine,seen no bubbles he seems to be healthy and he is very active at night.i watched a video on youtube on how to check for ri,again im inexperienced but im confident my guy is ok.if you could find a video that may help you to determine if yours has an issue.