I use dry pond ferts in my tank. Should works just the same as other dry ferts as long as you know what is in it.
Generally the pond ferts won't have ammonia (unlike many land ferts), so will be safe. You would need to know what is in the fert, & how much, so you can dose the tank appropriately. Do NOT dose based on the label ... that is meant for ponds & usu. is much higher than you need.