Is Quickrete Quick Setting reef safe?

[MarineGirl411]

I went to Lowes and picked this up to make some frag disks and rocks
http://www.lowes.com/pd_137836-286-...40:QUIKRETE&CAWELAID=&CAWELAID=1368001463#img


I am curious if this is reef safe? From what I remember Mr.Wilson say it's what he uses, but I want to be sure. Please let me know. Thank you.

It is Quickrete Quick Setting 10b gray cement mix. I know it's fast setting. Please let me know if this is safe. Thank you.

 

[Dmorty217]

Most all cements are safe, some require longer curing times than others. To answer your question it is safe to use.

 

[MarineGirl411]

"Most are safe" meaning some are not. I just want to make sure mine is on the safe list for sure. Hugs. Thank you for the response.

 

[DavidinGA]

I've used hydraulic cement without problem.

 

[Xxero]

I've used hydraulic cement without problem.

David, did you use the hydraulic cement in-tank with pre-existing water, critters, etc. or did you use it outside of tank, before set-up?

I'm just curious if it can be used underwater before it cures or if it needs to be used outside with dry air only???

 

[MarineGirl411]

Guys I am asking about this particular cement. Not hydraulic cement. Quick Setting 10-lb Gray Cement Mix

Make concrete repairs where rapid setting is required
Quick strength
Ideal for repairing broken edges of concrete steps and curbs
Has compressive strength and expansion characteristics similar to concrete

 

[MarineGirl411]

Is this safe?

 

[Xxero]

Sorry, MarineGirl. I didn't mean to side-track your thread. I recently used the Hydraulic version of what you're asking about, so I was curious as well.

I do not have an answer for you, but I am following along. My only concern is the product documents state that both contain 'Silicas'. Not sure about that either...

 

[JMorris271]

I used it for my koi pond and was just concerned about the PH leaching. Aside from that it was fine.

 

[DavidinGA]

David, did you use the hydraulic cement in-tank with pre-existing water, critters, etc. or did you use it outside of tank, before set-up?

I'm just curious if it can be used underwater before it cures or if it needs to be used outside with dry air only???

It's specifically made for wet applications, but I used it in my scape outside of my tank.