Nov 27, 2020 #1 BKLYN651 Active Member View Badges Joined Dec 28, 2019 Messages 169 Reaction score 171 Rating - 0% 0 0 0 Seems to have grown somewhat and is now forming a hole? Never gave it much attention.
Nov 27, 2020 #2 Garf 5000 Club Member View Badges Excellence Award My Tank Thread Joined Oct 23, 2020 Messages 5,751 Reaction score 6,706 Location BEEFINGHAM Rating - 0% 0 0 0 I’ve always assumed these were sponges.
