The Ultimate DIY Rocks!

very interesting and cool idea Inukshuk, would love to see something like that happen. would be great for the env., and would reduce the start up cost. not sure how to implement something like that, but great idea.
 
<a href=showthread.php?s=&postid=13582848#post13582848 target=_blank>Originally posted</a> by seaskraP
very interesting and cool idea Inukshuk, would love to see something like that happen. would be great for the env., and would reduce the start up cost. not sure how to implement something like that, but great idea.

Perhaps it could be done sort of the same way that frags.org is done.

Interesting idea.
 
so far i have over 160 pages and this is pretty informative.. great discussion and excellent info.

well im gonna try my first batch in a week or 2 but it is getting cold
and dry outside so im going to try something a bit different. im going to try and shorten the hydration period. im not sure if this will wotk at all or just help due to the dryness/time of year it is.

i am going to set up a rubber maid tote where i will put the rock onto an eggcrate that will be about 6in off of the bottom. i going to put 4 or 5 in of water in the bottom. i will place a heater in the water. then place a plastic bag over the top of the tote but under the lid, to help keep in the moisture. im also going to place a light over the tote.as close as i can get get it with out making it unsafe...
btw i forgot to add that is tote is insulated around all sides and bottom.

from what i know and have read about concrete is that it cures fastest and strongest when kept hydrated and what better to keep it hydrated than a place where the humidity could be close to 100%(im still looking out to find out exactly about the % of humidity it will hold) this way the rock stays naturally hydrated.

i plan on doing this for the 28 day period. then testing it submerged in water on day 29.(ph) then again testing it on day 36 to see if it fully kured

i will try to document this and take pictures as i do it
if this works then my next batch im going to try @ 24 days

im thinking of doing 2 or 3 batches with staggered start dates ,so this way if one doesnt work i can adjust the amount of time in either process so i only lose one batch

i hope this makes sense b/c i am terrible at typing what i am thinking...

sorry bout the long post but i wanted to explain my process
 
flukekiller,

All I read in you post makes sense... I have never done rock in really cold temperatures, but my guess is that cold temperatures may slow down the hardening and kuring process, but it will still work. You should't need to through away a bad batch... yet you may have to give it some extra time.

About moisture. Yes, moist is good. I usually take the easy approach and just spray water on my rocks (with a hose) every couple of days... but your moisture-keeping contraption should work even better.

I am eager to see pictures of the developments ;)
 
<a href=showthread.php?s=&postid=13583501#post13583501 target=_blank>Originally posted</a> by MeuserReef
Perhaps it could be done sort of the same way that frags.org is done.

Interesting idea.


seaskraP and MeuserReef

You should check ecoreef.org/rock ...it is like a frags.org ...but for rock.
 
Inukshuk, I really like your method of making "coral frags", then adhering them. From the pictures at least, it looks just like real rock.

What do you think of making a hollow centerpiece for a large tank? Maybe about the size of a large watermellon. I'm thinking of adhering the "frags" around an empty watermellon as a form. That way, fish could hide inside and corals could be mounted on it. And it would not be so heavy. In my mind's eye, it is upright kinda like a pillar and leaning a little to one side and leaning a little back. I'd build it on a flat surface lined with waxpaper for release. Feet could then be added and it would sit perfectly on the bottom of the tank.

What do you think?
 
To make "Hollows" use balloons of different types / sizes, cover with "crete" after hardened, burst balloon and voila.
 
salty joe,

It should work just fine. I done it a few times with the purpose of leaving a void to place a powerhead inside (with a side-hole for the nozzle). This is a good way to hide your gear.

The ballon idea works great... the only negative I find is that where the cement touches the balloon (inside walls of the cave)... the cement hardens in a smooth and not-natural shape. This is not a big issue because usually you can't see the inside of the cave.
 
<a href=showthread.php?s=&postid=13597274#post13597274 target=_blank>Originally posted</a> by crazzy
To make "Hollows" use balloons of different types / sizes, cover with "crete" after hardened, burst balloon and voila.

be careful with that. I think someone tried it a while back and there were issues with it.
 
<a href=showthread.php?s=&postid=13598447#post13598447 target=_blank>Originally posted</a> by Azazael13
be careful with that. I think someone tried it a while back and there were issues with it.

I would think any issues were not from the method. The balloons and inflated latex gloves have been used since the earliest days of aragocrete. You do have to think ahead a little. Leave the knot exposed or tape it if you can't, to avoid trapping part of the balloon. As to the interior being unnaturally smooth, some of the natural holes in live rock have smooth interiors, depending on what made them.
 
<a href=showthread.php?s=&postid=13603443#post13603443 target=_blank>Originally posted</a> by flukekiller
also i heard its easier if u fill them with water

:rollface: :lol: I want the video when someone tries flukekiller's idea, then pops it. :blown:
 
<a href=showthread.php?s=&postid=13594668#post13594668 target=_blank>Originally posted</a> by flukekiller

well im gonna try my first batch in a week or 2 but it is getting cold
and dry outside so im going to try something a bit different. im going to try and shorten the hydration period. im not sure if this will work at all or just help due to the dryness/time of year it is.

i am going to set up a rubber maid tote where i will put the rock onto an eggcrate that will be about 6in off of the bottom. i going to put 4 or 5 in of water in the bottom. i will place a heater in the water. then place a plastic bag over the top of the tote but under the lid, to help keep in the moisture. im also going to place a light over the tote.as close as i can get get it with out making it unsafe...
btw i forgot to add that is tote is insulated around all sides and bottom.

from what i know and have read about concrete is that it cures fastest and strongest when kept hydrated and what better to keep it hydrated than a place where the humidity could be close to 100%(im still looking out to find out exactly about the % of humidity it will hold) this way the rock stays naturally hydrated.

so does anyone have any thoughts or info that this might work better?

the only other question i might have would be, should i soak them for a 2 or 3 days first to try and get as much of the salt out as possible?
 
Depending on how much salt you use, you need to let them set for a couple of days before you touch them. Adding salt makes them much more brittle after the pour. I usually let them set a week and then soak them to get the salt out. It can take more than a couple of days.
 
I am still unable to use any of my rocks due to the pH being off the charts. I've been soaking a few rocks for over a year and others over 6m. I'm becoming skeptical that using these rocks is even practical?
 
Um, cement, oyster shells, sand and solar salt. The rock i made 14 months ago just tested at a pH of over 10 last night.
 
I'm becoming skeptical that using these rocks is even practical?

Mine were made with Alamo's Portland Cement and oystershell. Nothing more and nothing less. My coral have never had a problem with them, either. The pH is a stable 8.3, as well.

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Mine were soaked in a river for 3 months. I then placed them in a 50g drum of water and measured the pH. The water's level never changed.
 
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