3-4 weeks ago I bought 3 Ottos and put them in a Quarantine Tank for observation. I wanted to make sure they're healthy before adding them to my algae-overrun main tank. I began adjusting temperature in my main tank Monday, preparing for acclimation of the Ottos (cooling it down for them). Yesterday, unfortunately, one of the Ottos died. Not sure why really, but the thread is still in the FW disease forum. Anyway, two are left. I've been supplementing their diet with Zuchinni the past couple of weeks. There's minimal amounts of algae left in the QT. After yesterday's episode, my girlfriend doesn't want me to add them to the main tank until we're sure again that they're healthy and not going to make our Betta sick. I don't know what "good health" signs I'm looking for. One seems possibly bloated still, or just fat, or maybe just female, I'm still new to this so I don't really know.