African Dwarf Frog Death

[MadameGrenouille]

Hello

I would keep 4 frogs in a 5 gallons, species only tank is always better for frogs. I have 7 in a 10 gallons, living with a cory, with a lot of live plants and will upgrade for a 15 gallons soon, I have too many plants, they need more flippers room. If I were you, I would wait for my tank to cycle before adding more frogs(keep up with water change) and as Jen mentionned quarantine is important (I had two in a Kritter Keeper(1.5 gallons) for 3 months with a filter and heater) hope this help!