When introducing a new mobile invertebrate to your aquarium, it’s probably a good idea to turn off or decrease the speed of the powerheads so that they cannot blow the new addition all around the tank. Because any new inverts will be stressed and likely weak, and they may not be able to latch on to or hide within the rocks with all of the water flowing about them so forcefully. This can cause some serious damage, especially to those softer inverts that can scrape up against rocks and damage tissue. Lastly, inverts such as anemones have been known to crawl into a powerhead, causing them to get shredded and fill the tank with tons of dying tissue. So, whatever new invertebrate you add to the tank, be sure to see how they’ll fare against the equipment before walking away.