Wooo, sitting at 90pct recommended capacity for my system. Could probably add one more. Saw this amazing double tail female betta at Petco a couple days ago looking for a home, may be adding her to my sorority tank.
4 of my present 5 females were added together. The 5th was added bout 2 weeks later and had zero issue of picking on the new gal. In fact they act more like schooling fish as opposed to trying to avoid one another. If petco still has this female later today, she will be welcomed to her new home