Need help concrete blocks! just picked up 130lb cured rocks

AquaWave523 · 09/21/2012, 07:36 PM

just picked up 130lb cured fiji live rock off someone from craigslist for .75 a lbs!

Anyways, i noticed there were algae on the rock along with purple coralline, I'm using these rocks to seed my base dry rock. Are the algae going to be an issue?

Also, noticed he had Landscaping (concrete) Blocks in his tank. I dont think this will hurt the rocks I got from him since he had corals thriving in there for 5 years? I didnt take the blocks, only the live rocks. Just curious if the live rocks are negatively impacted by the concrete blocks.

"Made from conventional dense concrete, these solid CMU blocks are suitable for equipment pads, edging, raised beds, and many other applications. Our three component paver consists of blocks that are 3" thick and have dimensions of 6" x 6", 6" x 9", and 3"x 6". Laid together they form a 9" x 12" rectangle"

THe rocks are currently sitting in a brute trash can filled with rodi salt water with power head. Will be working on the tank tomorrow AM!

Thanks!

hollister · 09/21/2012, 07:40 PM

The coraline will die off . It should smell like the ocean if cured , then i would give it a good rinse in ro water for no more then 1 minute before adding in display tank.

AquaWave523 · 09/21/2012, 08:10 PM

Quote:

Originally Posted by hollister

The coraline will die off . It should smell like the ocean if cured , then i would give it a good rinse in ro water for no more then 1 minute before adding in display tank.

cant...tank isnt setup yet. filling tank up with water tomorrow. back to the main question at hand, algae and the cement blocks.

hollister · 09/21/2012, 08:15 PM

I would rinse and brush them off.Use a nylon brush. The cement blocks i would do them same.

AquaWave523 · 09/21/2012, 08:28 PM

Quote:

Originally Posted by hollister

I would rinse and brush them off.Use a nylon brush. The cement blocks i would do them same.

i didnt pick up the concrete blocks - just the live rocks. Question was if it being in the same water with the live rocks for all that time, are the chemical leaching from the concrete in the live rock as well if any?

He had fish and corals in there w/ no issues.

Algae question was if its on the live rock, is it safe to cycle with?

Right now its rinsed and soaked in ro/di saltwater til am when i have energy to start up my new tank

hollister · 09/21/2012, 08:42 PM

The concrete blocks are bacteria heavens. I would see no ill effect from useing them. Not sure what chemicals would leech out. But not from manufacturing.

GratefulReef · 09/21/2012, 09:41 PM

yea i would def take off all the non coralline algae..i put in a couple small rocks with just a little hair algae on my tank figuring the crabs/snails would prob eat it...boy was i wrong i had a bloom of hair algae that im still working on curbing every day i just brush a little let the powerheads catch it then clean off the powerheads seems like im catching up to fixing the problem but have a little ways to go still....also can't believe noone commented yet, 75 cents a lb for live rock, i wish i could find a deal like that

09/21/2012, 07:36 PM	#1
AquaWave523 Registered Member Join Date: Jun 2009 Posts: 911	Need help concrete blocks! just picked up 130lb cured rocks just picked up 130lb cured fiji live rock off someone from craigslist for .75 a lbs! Anyways, i noticed there were algae on the rock along with purple coralline, I'm using these rocks to seed my base dry rock. Are the algae going to be an issue? Also, noticed he had Landscaping (concrete) Blocks in his tank. I dont think this will hurt the rocks I got from him since he had corals thriving in there for 5 years? I didnt take the blocks, only the live rocks. Just curious if the live rocks are negatively impacted by the concrete blocks. "Made from conventional dense concrete, these solid CMU blocks are suitable for equipment pads, edging, raised beds, and many other applications. Our three component paver consists of blocks that are 3" thick and have dimensions of 6" x 6", 6" x 9", and 3"x 6". Laid together they form a 9" x 12" rectangle" THe rocks are currently sitting in a brute trash can filled with rodi salt water with power head. Will be working on the tank tomorrow AM! Thanks! Last edited by AquaWave523; 09/21/2012 at 08:35 PM.

09/21/2012, 07:40 PM	#2
hollister Registered Member Join Date: Apr 2011 Posts: 2,037	The coraline will die off . It should smell like the ocean if cured , then i would give it a good rinse in ro water for no more then 1 minute before adding in display tank.

09/21/2012, 08:15 PM	#4
hollister Registered Member Join Date: Apr 2011 Posts: 2,037	I would rinse and brush them off.Use a nylon brush. The cement blocks i would do them same.

09/21/2012, 08:42 PM	#6
hollister Registered Member Join Date: Apr 2011 Posts: 2,037	The concrete blocks are bacteria heavens. I would see no ill effect from useing them. Not sure what chemicals would leech out. But not from manufacturing.

09/21/2012, 09:41 PM	#7
GratefulReef Registered Member Join Date: Sep 2012 Location: syracuse,ny Posts: 288	yea i would def take off all the non coralline algae..i put in a couple small rocks with just a little hair algae on my tank figuring the crabs/snails would prob eat it...boy was i wrong i had a bloom of hair algae that im still working on curbing every day i just brush a little let the powerheads catch it then clean off the powerheads seems like im catching up to fixing the problem but have a little ways to go still....also can't believe noone commented yet, 75 cents a lb for live rock, i wish i could find a deal like that