A 6 qt is fine, but it'd need to be upgraded to a bigger (15 qt) tub once it reaches 30 grams or so... Considering a leo can easily gain 5-10 grams in a couple weeks it definitely won't make for a long lasting solution... So if you're asking because you're getting or planning to get a leo of said size and are contemplating housing, I'd just go for the 15 qt...
well i have 6, 41qt. bins and i was thinking of shoving a piece of cardboard to divide each one. I was seeing what the smallest space was so i could save some room. maybe i'll just divide into 4 (about 10q for each hatchling)
I have personally kept the crappy eaters in small cages like a 6Q Iris tub(more floor space than other tubs) because they get to see the food and eat well I then change them to a 15 Q sterilite tub if lived single or a 41Q tub for a group.
how much did they weigh when you put them in a 15Q? and how much should they weigh when you move them even bigger than a 15 Q.(if you want to have the smallest cage confortably)