We can certainly see how much you loved/love your little froggers. Like Dr. Barb said... we can help you get your water params in order and make for a healthy home for your remaining ADF.

Don't forget to read through the FAQ's and Caresheet linked to above... which may answer some more of your questions. I believe they don't mind living on their own... but I think they're considered social critters (I don't keep them... but have several friends here who do!) If you do get another ADF... make sure you quarantine him/her first before introducing. I believe our frog experts also recommend a special kind of "bath" to pretreat the frogs against the chytrid fungus.

Good luck!

Michele