hi, just added a single anubias nana to the cycling 10 gallon tank (1 week). I heard they are good for cycling with fish (2 zebra danios). Is it too early to add one more to the tank if it helps keep the ammonia low for the fish? Which other type of hardy plant would be good in the same light conditions as the anubias? I understand it needs low to moderate light, any other suggestions? Thanks!