He is only supposed to be 2.5-3 inchesHonestly, it’s rather sad looking and yes, as said before, currently that baby clown has space but it’s a living animal and will GROW to adult size. Folks are loosing patience with you as you continue to try to convince yourself and others that this is an ok way to keep your pet.
Ps. I have a 20 long it is freshwater right now but planning on changing it to salt soon.