Objective: Breed adult Thor ambionensis and raise the larvae to adulthood.
Goal: Settle and cue Blue Velvet Nudibranch.
Explanation: Sexy Shrimp and Blue Velvet Nudibranch have similar developmental stages requiring similar specialized conditions. Sexy Shrimp have been successfully settled and cued by others, completing the full breeding cycle. I will attempt to master this breeding methodology for reapplication to Blue Velvet Nudibranch. Thus far no one has successfully completed the full breeding cycle of BVN.
Partners in Pr0n:
I will begin this breeding project by constructing a Kreisel Aquarium, using the following items.
10g Glass Tank:
6g Polyethylene Jug:
The 40gph pump is made for desktop fountains and has a max lift of 1.8 feet. It comes with a 5/16" O.D. outlet coupler that appears intended for black hydroponic tubing.
Instead, I will mate this pump to loc-line, using the following items.
Vinyl Tubing: 7/16" O.D. x 5/16" I.D.
Nylon Adapter: 3/8" barb x 1/2" male-threaded.
PVC Coupler: 1/2" female-threaded x 1/2" female-threaded.
Loc-line Adapter: 1/2" male-threaded x 1/2" Loc-line.
A happy marriage!
The vinyl tubing is not a perfect fit to the nylon adapter and requires a little stretching (1/16" to be exact). A little REEF-SAFE silicon grease can be used if needed, but I find without it the snug fit makes a clamp unnecessary. I'll probably clamp the vinyl tubing to the outlet coupler with a nylon zip-tie.
I will also use this 3" PVC as circular baffle. I could only find ABS in sizes larger than 2", here in town. So I ordered this 5 foot section of grey 3" PVC along with the 6g jug.
Now I know what you're thinking. Devils workshop, right?
Have no fear! Packaged with this faith questioning piece of plastic, came this!
I couldn't make this up if I tried.
As for that jug...
It's perfectly round on bottom, but slightly oval on top. However, I only need about the bottom 10 inches, so this should work.
Next, I will cut the PVC to length and place it vertically in the 10g tank. I'll temporarily seal the bottom to the glass, probably with silly putty, and submerge the pump inside the PVC. Then I'll experiment with the overflow in an attempt to draw water equally from all sides.
Anyone who has ever tried to get a perfectly straight, perfectly perpendicular, and perfectly flat cut of PVC knows, a conduit cutter is needed. Fortunately, I just happen to have one!
Hacksaw and sandpaper it is!
This is an 11" section, sanded to ad nauseum, with silly putty finish.
Viola! Now it's erect.
The GPH looks really good...
...but the overflow trickles down just one side.
I've given it some thought and I believe the best solution is to use micron sock at the point of overflow. This way it will diffuse across the entire surface, hopefully drawing water equally from all sides.
I use these on my sump drain and bought an extra one just for the material. It doesn't wick and it diffuses water flow really well.
100 Micron Filter Sock:
I've wrapped a small strip around the outside of the pvc, held in place by a rubber band.
The overflow has now broken into about 8 smaller streams spaced fairly evenly around the circumference.
I believe this is actually working even better than it appears because the flow only breaks into separate streams upon hitting the inner edge. As you can see, the water level rises about 1/4" above the edge of the PVC as it initially flows thru the micron sock. When the pump is turned on and off, the streams very gradually rise and fall more or less in unison.
I now feel confident that this methodology will spread the draw over a greater area, more evenly, and thus much more gently.
The following thread has been added to this thread's net:
Cross posts coming.
Whys Alives, nice to see that someone is taking it to the next level. Protandric hermaphrodite means that all larva are male upon birth, and may switch into females later in their life cycle. Very interesting that you say you want to try to raise Chelidonura varians, because I also am interested in growing them. I have a thread about Chelidonura varians in another forum, and quite a few ideas and material. I'll let you know when the project is started.
I've taken both the top and bottom off of the jug. I tried several different tools, but ultimately found a hacksaw worked best. As I suspected, without the oval top, the jug now seems genuinely less stressed and more well rounded. In fact, it immediately wanted to go outside to play.
I'd be honored to have your collaboration, Pj. I have found you and jayelblock both to be tremendous assets in my efforts thus far.
It's looking good so far. I'd keep an eye on that overflow, though. It doesn't take a whole lot of detritus to clog up 100 microns.
Good point! I could always try a larger micron, but for now I'm thinking I'll just make 3 or 4 strips and rinse them out when needed.
At the moment I'm trying to decide how I want to open up the jug for access from the top once inside the tank. It seems clear I'm going to need to get my whole arm in there, just so I can glue the jug in place, but maybe not. I'm trying to approach this without assumption, so well see what I come up with. How much access would be needed otherwise? Might it be possible to just place a small hole on top, large enough for some vinyl tubing, and use that to siphon things out?
I have a good idea as to how I want to design the screen separator, but what micron do I need for sexy larvae? I'll need to replace it later with the proper micron for BVN.
Edited by Whys, 27 March 2011 - 10:20 PM.