The Ultimate DIY Rocks!

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Have any of you guys visited Garf.org ? They have test data on curing and different recipes for rock. Pretty infomative stuff. Take a look.
 
Nice rocks T. One question about the stucco. I read some where that the reason stucco is used on the west coast and drier climates is because it does'nt do will in moisture. Have you had any problems with weakness or flaking ? One more thought it has a habit of mildewing as well, do you think there is any reason for concern here ?
 
Well thanks! The east cost/ west coast thing came up before, and while I havnt cured the rocks yet, I doubt it should be an issue. Reason being is 1) stucco is a concrete mix. Concrete is holding it together, so it shouldnt dissolve in water. 2) reason I think it is not used on the east coast is since it is applied relatively thinly and with little reinforcement, when it gets wet and then freezes it probably cracks and falls off. I dont see stucco used anywhere that it gets very cold, for example up in the mountains, even in SoCal. That's my hypothesis, but I cant say for sure till I soak it for a few weeks.
 
I bought some Portland type 1a cement, will this be ok to use? It is the closest I could find. It says that it is used for general contruction. There was also Type N but I was not sure if that was ok to use.

Thanks,
Josh
 
I dont know what type 1a and N contain and their differences, but I dont think there are many things that could be in it that would make it unsafe...
 
i was wondering if anyone had ever added a buffer to the water while curring the rocks and if so what was your results.
 
<a href=showthread.php?s=&postid=8901801#post8901801 target=_blank>Originally posted</a> by mhj1580
i was wondering if anyone had ever added a buffer to the water while curring the rocks and if so what was your results.

I know alot of people have used buffers to lower the ph in the curing water therefore speeding the process...im not sure which they used.

I havent used any myself i just put my rocks in the back of the toilet surge, box, back thinggy... if you do its turning waste water into useible water that changes around 80%-90% each flush.
 
He is not putting it in the bowl, but in the tank, which flows into the bowl. The water there should be quite clean. A clever idea. I feel safe using tap water, so I may consider that idea when I get around to making my rock.
 
HAHAHAH, that was funny. "No, not in the bowl!"

You guys have any problems with brown algae on the rocks later? Personally I wouldnt do it b/c my silicate is off the Salfert scale... I even found a correlation between washing my hands with tap vs RO/DI before putting them in the tank. Finally stopped my brown algae on the glass.
 
I am having problems forming rocks that look like the real thing. Any suggestions on how to improve my technique. What I want to do is form 2 pillars in my 150 gallon. I currently placed some 1" PVC in the middle of the rocks to hold up the pillar. Any other suggestions?
 
Josh,
The easiest answer to that question is like the old joke about "How do I get to Carnegie Hall?"

Practice, practice practice.

Been a while since I've posted in this thread, but (I like to think) my techniques and results improved with each batch.
Good luck!
 
fingers, thumbs, rocksalt crystals, bubble wrap (from another thread, I haven't tried it yet, but it looks great)

As far as I can tell, creativity with the diy rocks is limited by imagination.

Try making small batches, so you can practice different methods each time. (You'll want to throw a few rocks away, or break them up for base rock, I know I did)
Again, good luck!
 
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