Rock Re-do - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 28 Old 01-20-2009, 01:27 AM Thread Starter
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Originally Posted by conger View Post
a shelf or plateau would be absolutely awesome. Unless you find the perfect rock(s) to do that, you'll have to get into drilling and acrylic rodding, or otherwise epoxying and tying, etc. If you go that route, be sure you update this thread or another, and explain how you did it! I'll be interested thats for sure, and may end up copying you Er, "borrowing" your idea
LOL, that'd be cool. I was thinking of using zipties to hold the formation together. I know that they use that in the GA aquarium, but i think the ties get brittle over time and they have to re-do them, so i don't know how i'd feel about that.
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use plastic coat hangers instead
I may consider using this instead though...

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post #22 of 28 Old 01-20-2009, 01:39 AM
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well i would actually use a combo of ties, hangers and concrete, drill your holes, and use the ties and hangers to hold the rock in place for the short time it takes for the concrete to set, then you can just snip the ties off

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post #23 of 28 Old 01-20-2009, 02:00 AM Thread Starter
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What's the curing time do you know?

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post #24 of 28 Old 01-20-2009, 02:13 AM
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i think different kind are different times. i have never done this myself but my club did a workshop and i watched it being done. i want to say the stuff they were using sets up fast, in like 5 minutes. to completely cure it prob. takes 48 hours ( just guessing )
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post #25 of 28 Old 01-20-2009, 11:50 AM
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if there was a 5-minute set time, they were probably using some sort of epoxy. Most types of concrete take several weeks to fully cure (it'll be "hard" long before that, but not completely cured for several weeks). I know if you use Quickrete Quickwall, it cures in a week or two (but, it is full of small little fibers that might not be desireable for a saltwater tank).

In fact, many kinds of concrete will also affect the pH of water. However since you'd only be using a small amount to fill in drilled holes around coathangers, then it might not be enough to actually have an impact.

Kells, any reason why you proposed using concrete as opposed to some kind of aquarium-safe epoxy? Besides, assuming you'll be doing some of this on your existing liverock, you'll want to leave it underwater while you work with it, or at least only out of water for a short period of time. With concrete, that might not be possible... some things to think about anyways.

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post #26 of 28 Old 01-20-2009, 07:52 PM Thread Starter
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wow, thanks for all that info. I won't be using concrete, i was just considering my options. that doesn't really look like one. I may do a plateu, but i'll just use zipties and hangers(rods) if i do. We'll see...

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post #27 of 28 Old 01-20-2009, 09:20 PM
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well i still think something in place of the concrete would be useful, as you mentioned so you can cut off the zipties (or if they become brittle with time). There are lots of epoxies, probably cheaper than a bag of concrete (and certainly less messy to mix!)


AquaMend comes to mind, but there are plenty, you can find them in Home Depot and probably at a LFS as well. Its like a putty that you knead with your fingers, then press in to place. It can be mixed/applied under water, should set within minutes, and would be perfect to stuff in the holes around your hanger rods.

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post #28 of 28 Old 01-21-2009, 08:46 PM Thread Starter
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As i'm in an apartment, concrete mixing isn't really going to be something i want to do. The apt is already cramped as it is and we have very nosey neighboors. I'm not really looking into the concrete as a solution. Perhaps i won't go with this idea of a plateu... would be cool though, but i don't know how i'd do the rest of the tank anyways. It'll look unnatural to have corals on the sand, and it'd be a pain to get my corals where i'd want them...

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