I had read that a 10 gallon is good for 2-3 toads and that the general rule is 4-5 gallons per toad. I have read multiple articles that say that a single toad can be housed in a 5 gallon and if you want more, do 5 gallons for each one, so 2 in a 10, 3 in a 15, 4 in a 20, etc. and I know it sounds like a lot, but it is possible to fit everything in. I do the gravel slope, put the ecoearth on the land part, have the hide in the back left corner, put some philodendron around it on each side, put the mopani wood in the back right/middle going onto the land a bit, put in my two small anubias plants, fill with water and add some duckweed and java moss. Done! It’s hard to picture without seeing everything, but take my word for it, it is quite possible to fit it all.