Mar 22, 2020 #1 Sinibotia Active Member View Badges My Tank Thread Joined Oct 2, 2019 Messages 171 Reaction score 261 Location Portland Maine Rating - 0% 0 0 0 I noticed a black spiky growth on a rock today in my 10g reef. Dont know for sure how long it has been there as I just moved the tank and the rock got turned somewhat.
I noticed a black spiky growth on a rock today in my 10g reef. Dont know for sure how long it has been there as I just moved the tank and the rock got turned somewhat.
Mar 23, 2020 #2 OP OP Sinibotia Active Member View Badges My Tank Thread Joined Oct 2, 2019 Messages 171 Reaction score 261 Location Portland Maine Rating - 0% 0 0 0 Update: the "spikes" seem to be retractable. The growth was nearly smooth this morning.
Mar 24, 2020 #3 reef lover It's a reef thing.... View Badges Excellence Award Reef Tank 365 Hudson Valley Reef Keepers Hospitality Award 518 Reefers My Tank Thread Joined Jan 1, 2013 Messages 14,296 Reaction score 44,612 Location new york Rating - 0% 0 0 0 Looks like sponge.