Making LR Structure with CEMENT

[SnowManSnow]

I forget.. what type of cement do I want to get to make rock structures out of? Will plain quickcrete work minus the gravel?

I'm making a vertical structure of LR that I am going to attach (somehow) to the SIDES of my overflow box in the back of my cube. I need to use somthing substantial to hold the LR segments (that I will break and cut to fit) into place. So what kind of cement? i forget

thanks

b.

 

[Anonymous]

IIRC it is portlan cement. You will need to cure it for quite sometime before is leaches out all the crud and becomes stable.

 

[Omni2226]

White Portland cement if you can get it. You could also use the great stuff foam insulation to make a fake stone/rock work cover for overflow boxes and/or to hide plumbing.

 

[bleedingthought]

Omni, are you talking about the yellow foam from great stuff? Does it change it's color or pick up algae/coraline after a while?

And how long until you can put the foam covered stuff back in the tank?

 

[Anonymous]

It is also known as type III or fast early cement. It's quite a bit more expensive than type II portland. I think I paid around $9 for type II and about twice that for type III

 

[liquid]

There's also thorite which doesn't have the pH problems that the standard Portland types have.

Shane

 

[Omni2226]

I be danged if I can find the thread now, but a guy did a nano tank with greatstuff and small rocks.

The entire back wall and one side were done this way. I dont know if anything will encrust on it or not. Mmm you could sprinkle plastic dust/shavings into it. I know corraline loves plastic/pvc.

 

[bleedingthought]

But it won't work underwater, right? Like on the overflow box in a filled tank? Seems chemically dangerous and doesn't seem like it would stick... :roll:

 

[fungia]

you make it and cure it out of the water.

 

[Omni2226]

Hah hah found it ! It was driving me nutty so I dug it up. Its an article in reefkeeping magazine..

http://www.reefkeeping.com/issues/2003- ... /index.php

Never could find a follow up to it though so I dont know if there were any long term issues with it.

 

[SnowManSnow]

I'm just going to use 1/4 inch plexiglass and use nylon bolts to bolt into my live rock (with some epoxy to hold it for sure) and make my vertical structure that way.

I'll then simply silicon the structure to the overflow sides

B

 

[Rob Top]

I have heard that there are long term issues with great stuff braking down over a few years. I was planing on using it to cover my overflows until I heard that. Now I'm likeing your idea of bolting rocks to an acrylic sheet SnowManSown. Cheaper than
http://www.captiveoceans.com/mm5/me...duct_Code=KWD11&Category_Code=OVerflow_Covers

 

[Omni2226]

If it stays under water all the time glue some zoa polpys to it and let em cover it up.