From what I can tell the corals don’t look like there being stinged, I have some ricordias, hammers, chalices, and a few Acans in the tank and they all look fine. From what I’ve read they will hopefully die off as the tank ages, but for now I just scrape them off the glass and try to guide them to the over flow pretty much every day. It’s pretty odd they’re mostly on the glass so it’s not too hard to try and remove them. Im pretty sure I’m seeing a small decrease in the population. I should get some more pods and see if your idea works. They’re pretty weird creatures I haven’t been too worried about them since they don’t bother anything but still want to get rid of them. It’s pretty funny what you said about the wrasse, I have a clown in the tank and every time I clean the glass and the hydroids fly off the glass the clown swims over and slurps them up lol. He seems to enjoy them so I don’t worry about it much. Here’s the tank the coral look fine to me. Keep me updated and let me know if the pods work.