I have a green wolf eel, and a snowflake moray eel. I want to keep them together, but was wondering, what is the smallest tank I can keep them in? I have read that neither one of these fish need alot of room as long as there is places for them to hide out. I have them in a 40 gallon tank now, however both fish are still small, and if it is recommended to move them to a bigger aquarium, I'd like to do it now while they're still small. Thanks guys!