is it ok if my yellow tang eats spinach for a few days untill i can get some seaweed for it, or is the spinach not good for it.... is there any other greens that it might be able to eat
Spinach should be fine, or just normal grazing and fish food also. I have a happy healthy yellow in a 120 and don't feed it special....it scavenges and eats whatever goes into the tank....