John Freas 6 Report post Posted July 4, 2018 These little white things have been growing in my sump. Anybody recognize them? They aren’t in the display tank AFAIK, and appear to be harmless other than the fact that they are multiplying slowly. Cause for concern? Celebration? What the heck are they. Quote Share this post Link to post Share on other sites
SilentNight1793 134 Report post Posted July 5, 2018 They look like pineapple sponges. just a filter feeder. wont cause any harm unless they start to overtake a return pump. 1 Quote Share this post Link to post Share on other sites
John Freas 6 Report post Posted July 5, 2018 Cool. Thanks. Does anything eat them? I assume I don’t want them in the display tank. Quote Share this post Link to post Share on other sites
SilentNight1793 134 Report post Posted July 5, 2018 Nothing I can think of eats them. They don't harm anything like I said other than when they start getting to large #'s. I have only ever had them in the overflow and in the sump. Not to say they are in the display tank hidden in the LR. Quote Share this post Link to post Share on other sites
ryansweet 201 Report post Posted July 6, 2018 Agree on the pineapple sponge. They are a great filter feeder and help to clean the water of organics. There are certain fish and sea stars that will eat them, but they are not usually good for our reef tanks as that's all they eat. If the sponges get into your display they will stay in low to no light areas and not harm anything else. 1 Quote Share this post Link to post Share on other sites
John Freas 6 Report post Posted July 7, 2018 Awesome! I can use all of the help that I can get with nutrient removal. Thanks for helping to ID these guys. Quote Share this post Link to post Share on other sites
3FordFamily 54 Report post Posted September 3, 2018 Regal angelfish love to eat these! I suspect an idol would as well! Quote Share this post Link to post Share on other sites
