So I'm fairly certain I have a few digitate hydroids in my main tank. I've seen probably 3 or 4 putting out their telltale strings from my frag rack at night. When I shine a light on them they retract. So far they don't see to be bothering the zoas, but I'm wondering how proactive I should be about trying to get rid of them. From my brief research, I know the best way to combat them is to try and starve them out but I'm wondering if there are other methods available, especially since their location is pretty easily accessible. It's not like they're tucked into the rockwork where I can't get to them. Thoughts?