What's this?

steo123 · 08/22/2019, 06:06 AM

What's this white stuff growing on my live rock?

Sent from my SM-G965F using Tapatalk

billdogg · 08/22/2019, 07:07 AM

My guess is an encrusting sponge. Is it hard or firm but a bit squishy ?

mcgyvr · 08/22/2019, 08:06 AM

Yep.. Sponge.

steo123 · 08/22/2019, 08:39 AM

Good or bad?

Sent from my SM-G965F using Tapatalk

steo123 · 08/22/2019, 08:39 AM

It used to be purple now it's going white

Sent from my SM-G965F using Tapatalk

Cedjeffski · 08/22/2019, 09:26 AM

Sometimes my Coraline will die off like that, I have a few spots like that due to calcium levels changing and or flow rates changing in certain areas.

Sent from my iPhone using Tapatalk

Cedjeffski · 08/22/2019, 09:27 AM

That’s just a guess though, hard to tell from just a picture... but if it was purple I know it’s white, that would be my guess.

Sent from my iPhone using Tapatalk

mcgyvr · 08/22/2019, 10:12 AM

Quote:

Originally Posted by steo123

It used to be purple now it's going white

Well.. now based on that its likely a type of coralline algae..
Its harmless

Uncle99 · 08/22/2019, 02:41 PM

If it was purple, maybe a dead purple sponge?
Sponge is a good, most consume silicates in the water column to build their structures.

saltpeter · 08/22/2019, 04:03 PM

Do you have urchins? My 2 hitch hiker urchins have started munching the purple off my rocks.

08/22/2019, 06:06 AM	#1
steo123 Registered Member Join Date: Aug 2014 Posts: 51	What's this? What's this white stuff growing on my live rock? Sent from my SM-G965F using Tapatalk

08/22/2019, 07:07 AM	#2
billdogg Registered Member Join Date: Apr 2008 Location: Grove City, Ohio Posts: 10,806	My guess is an encrusting sponge. Is it hard or firm but a bit squishy ? __________________ I'll try to be nice if you try to be smarter! I can't help that I grow older, but you can't make me grow up! Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer

08/22/2019, 08:06 AM	#3
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	Yep.. Sponge. __________________ Who me?

08/22/2019, 04:03 PM	#10
saltpeter Registered Member Join Date: Aug 2006 Location: Dublin,Ohio Posts: 151	Do you have urchins? My 2 hitch hiker urchins have started munching the purple off my rocks. __________________ There's always a bigger fish : Master Qui-Gon Jinn.

08/22/2019, 08:39 AM	#4
steo123 Registered Member Join Date: Aug 2014 Posts: 51	Good or bad? Sent from my SM-G965F using Tapatalk

08/22/2019, 09:26 AM	#6
Cedjeffski Registered Member Join Date: Feb 2019 Posts: 68	Sometimes my Coraline will die off like that, I have a few spots like that due to calcium levels changing and or flow rates changing in certain areas. Sent from my iPhone using Tapatalk

08/22/2019, 09:27 AM	#7
Cedjeffski Registered Member Join Date: Feb 2019 Posts: 68	That’s just a guess though, hard to tell from just a picture... but if it was purple I know it’s white, that would be my guess. Sent from my iPhone using Tapatalk

08/22/2019, 02:41 PM	#9
Uncle99 Crab Free Zone Join Date: Sep 2017 Location: Ontario, Canada Posts: 2,906	If it was purple, maybe a dead purple sponge? Sponge is a good, most consume silicates in the water column to build their structures.