| Frags (Fragments of corals)
Disclaimer: Before you attempt any fragging of your own, do research on the coral you would like to frag and make sure it's a good one for fragging.
Looking at my reef aquarium right now, the amazing thing is that there isn't a coral in there I couldn't frag with a pair of scissors or shears. In fact all my corals came to me that way, as frags from fellow hobbyists. Nothing from the wild.
In the 1980's - early 1990's, it was just hard to keep corals alive. With today's filtration and knowledge, we are not only finding it easy to keep many corals, but easy to frag them too.
[b]Soft Corals[/b]
Many soft corals are pretty easy to frag. Remove the specimen and place in a Tupperware bowl with some tank water. Use sterile and sharp scissors and cut about a 1" piece. (Mushrooms can be cut like pie.) At this point you can dry it a bit with a towel and put some superglue on the bottom of it to attach it to some substrate or rock and lightly tying with a rubber band so it doesn't float away. Or, alternatively, use fine plastic mesh like a wedding veil to secure it to a rock. Doing so on a small rock is a good idea should you want to move it later - commonly they are put toward the bottom of the tank so there is less shock with less light and current until they recover (May take a couple of weeks).
At this point you want to discard the water in the Tupperware as it will contain a lot of slimy mucus from the cutting that you don't want to put back in your aquarium. Oops. Almost forgot. I am not a big rubber glove guy, but this is surgery and you might want to use some for your protection and that of the coral. You don't want to wipe that stuff in your eye. ;)
[b]LPS (Large Polyp Stony) Corals[/b]
LPS can be tricky from what I know. Again do research on the coral you are thinking about to see if it's suitable for propagation.
Again remove the specimen from the tank and place in a bowl with some tank water. Techniques to cut the hard base include a hammer and chisel, strong shears or a rotary dremel tool. This will likely be determined by the size of the coral and what tools you have available.
Some of these corals are difficult because they have soft meat that go across the top. You will have to carefully split the base of the coral with some of the tools above and cut the meat with scissors. This can be messy and scary from what I have seen at frag swaps, but many will recover. A slower and safer method is to not cut the meat and carefully place the coral on the bottom of the tank with a rock in between the split base to put light pressure on the meat above. I believe you are supposed to put a little more distance between the split base each week and this can take a while (months?) for the meat to split on it's own.
[b]SPS (Small Polyp Stony) Corals[/b]
Fragging SPS corals can actually be pretty easy in my experience. Surprisingly so. Do the usual Tupperware technique. But what's wild at this point is some of SPS coral can merely be broken apart by hand! I received an Acropora coral from a friend (Hi G!) that was suffering from RTN - rapid tissue necrosis - and I was able to save it by merely breaking off the healthy tips with my hands and gluing to a rock. The tips are now growing well with no signs of RTN!
Otherwise using shears with work well and be sure to glue SPS to a rock or cement plugs as they will knock over easily. Unlike some of the other types of frags, SPS frags will benefit from good flow and light.
Want to get some frags for your tank? Do some research online and make some calls to see if there are any frag swaps in your neighborhood put on by local reef clubs. For the price of membership, you can get a lot of frags. I paid $20 and got about a dozen frags. That's a good deal. It's fun to trade too. There are also some companies online that sell frags. Check out 3reef sponsor, Coraldynamics.com. This company only sells frags. Way to go!
[b]DIY (Do-It-Yourself) Rock[/b]
After my initial revelation about the impact of our hobby on the ocean's fish and coral, it didn't take me long to realize that surely all the live rock we are pulling from these exotic places must be having an impact too. I mean I had 60 lbs. of it in my 30 gallon. At the time people were recommending 2 lbs. per gallon (current recommendation is 1 to 2 lbs. per gallon). So that's a lot of pounds per tank. Think about all the rock in your tank, all your friends with rock, all the fish stores, and that's a lot of rock. Some might say, 'Hey it's just rock man!' And that's true. But that's rock with a lot of life on it and rock that is providing habitat for many of our friends from the ocean. How long can one of these little islands provide rock for us before we have to move on to another island?
So with my current tank, I said I was going to go a different way. I was going to make all my rock myself. It was a bit daunting at first, but once I got into it, I started having a lot of fun. It's one of those things the whole family can get into. And you know what, the rock turned out great and after a while, has tons of coralline algae, feather dusters, sponges and now frags, growing all over it. Although it took time, it's really rewarding now - I can look at all of it and say, 'I made that!'
Does DIY rock work as well?
Well this can be debatable, but if you do what I did to make your porous, I don't see why not. Let's think about this.. common knowledge says that the main benefit of live rock is the surface area for bacteria to grow and help keep your tank stable. So if you make your rock with some tricks like putting pvc pipes in the middle and drilling the heck out of the rock with a masonry drill bit, then you will have some light weight, very porous rock. Plus it looks more natural. Mine has pods going in and out of it. So I think it's working just fine.
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