Oh man... thats the worst infestation I've seen in a while. Only worse case than that were wild colonies that came in infected. If you want to save the frags, I would carefully frag off 1 polyp and dip that really well, brush it with a tooth brush, and generally follow protocol. If you have a microscope or magnifying glass use that to look for and target eggs. I might even look at a freshwater dip for this particular case since you have so many egg-laying adults. TriggerFinger is right, with that many adults coming out. I have no doubt that your entire tank has been infested. Im sorry to say this, but the best choice for you right now is to make single polyp frags of all your zoas (cleaning them with the above method) and throw away or QT the rest. Put them in the sump and change out whatever mechanical filtration you have with the finest mesh/felt possible and start running carbon. With all the zoas removed, the spiders should begin to starve to death and the upgraded filtration will stop larvae from entering the sump and finding your clean frags. The carbon is just a precaution because as the spiders die, their bodies will start polluting your water. I would leave the frags out of the DT for a good 3-4 months, just to make completely sure that all the spiders have died and you wont get re-infested. Good luck
