Worried About manits Shrimp & Gorilla Crabs

Update

Update

My "TBS" tank, 65 gal with 40 gal refugium/sump, has been running now for 9 months since I put the first part in. T5 lighting.

The primary critters are:

6-line wrasse and royal gramma, both around 3 inches long that I bought, plus critters that came with the rock:

two serpent stars
a pistol shrimp
a peppermint shrimp,
a mantis (~2+ inches long),
two red mithrax, one pretty big
2-3 remaining gorillas, small
1 sea cucumber
and the usual assortment of stuff that come on the rock.

I originally had 3 cucumbers. One of them died within a few months and I was able to pull him out. The 3rd I have not seen since the start, but I never found him dead, which I fear means he is/was rotting amongst the rock somewhere. Maybe he's just reclusive. The one that I see moves around a lot.

I added another batch of hermits and snails about a month ago.

I've got a small brown scopas tang quarunteeing at the LFS.

There was an anenome (big beautiful white one at the start), and two gorgonians, and a sea fan - all died within 6 months.

Some of the tubastrea that came with the rock bleached about 3 months ago - 3 patches of them, one really nice bifurcated one :mad:, but there are 4 or 5 patches that seem to still be doing well.

I took 10-15 gorillas out at the start, and think I got all the big ones. The ones that are there now, I rarely see, although I can sometimes entice them out to compete for a food scrap. And they done seem to be bothering anyone, they hide all the time, at least during the day.

I don't have any corals for anyone to mess with at this point. Once I get a better handle on the algae, I intend to add some more corals.

So far the mantis doesn't' seem to be bothering anyone. He/she is beautiful looking. Eyes like a lobster that move independently on the end of "arms". And he can move fast. I've seen him peck at others getting too close when he's got a piece of food in his mouth. He takes food from me with tongs readily if I don't' scare him off. I have tried several times with two different types of commercial traps to trap him, to no avail.

Others have said the mantis click, but only the pistol clicks, and not very much, although fairly consistently when the lights first go off at night. I know it's the pistol because he was in there with part 1, and the mantis wasn't, and the clicking started with part 1. I've never heard dual clicking, or clicking with a different sound quality to it.

Everyone is cohabitating well.

Now if I could just get rid of the algae in the display. I've got a garden of green hair algae, which I have yet to do wholesale manual cleaning of, and it is out of control. Some brown. Same cyano. I had a lot of cyano at one point, it died back, and I've seen just a little coming back recently. Ammonia, nitrate, nitrite, and phopsphate are all 0, and I do a monthly 5-6 gal water change.

Tell me again about your tank?

I am going to post this on the TB forum. And will post some pics once I get some of the hair algae out.
 
Re: Update

Re: Update

<a href=showthread.php?s=&postid=10000864#post10000864 target=_blank>Originally posted</a> by Tobman


Now if I could just get rid of the algae in the display. I've got a garden of green hair algae, which I have yet to do wholesale manual cleaning of, and it is out of control. Some brown. Same cyano. I had a lot of cyano at one point, it died back, and I've seen just a little coming back recently. Ammonia, nitrate, nitrite, and phopsphate are all 0, and I do a monthly 5-6 gal water change.

Tell me again about your tank?

I am going to post this on the TB forum. And will post some pics once I get some of the hair algae out.

whats your water source ?

before I started using RODI I had problems.
after RODI that alge went way down.
 
me and tobman set up our tanks about the same time last summer. mine is a 29 gallon reef. at the moment it is doing excellent with four or five peices of sps and about the same of lps. there are three pistols in there and a few gorrillas left that does harm anything. i would recommend this rock but, when i buy it again for a larger tank, go over it a bit more thouroughly before i drop it in.
 
<a href=showthread.php?s=&postid=8346817#post8346817 target=_blank>Originally posted</a> by rockdiver
I just put it all in you want to have a REAL reef well they dont hurt anything maybe snails get eaten but thats ok with me
cuz they are VERY cool to watch.

I thought I was the only one! Thank you. I have to purchase hermit crabs and snails (as food), but they are readily available and cheap.
 
The best way we have found to capture gorilla crabs is to attach a small piece of tilapia to a small rock with a rubber band and put it in a drinking glass. Tilt the glass against the rock where you know the crab had been recently. The crab will climb in but won't be able to climb out because of the tall slippery glass. At that point it's easy to remove him from the glass. Of course you will get other things climbing into the the glass too. We've had hermit, snails, decorator crabs and brittle stars all climb in. The Decorator and brittles can get out but not remove the bait because it's attached to a rock.

We also have used 15" long BBQ skewers to spear them when we find them climbing in an area where we can get to them.

Now the mantis is another story. I agree that the only "easy" way is to do the dunk, swish and squirting of the rock when you receive it. We didn't do this with our first shipment of rock and still haven't been able to remove one mantis even though we have removed every rock one at a time. He was smart enough to move on. We've tried traps but he avoids them. We currently are putting bait into a large net near where he likes to lookout hopefully letting him get secure into taking the bait. We're hoping to net him one of these days but aren't holding our breath. I'd love to hear how others have been successful in removing them. Our bugger is a smart devil.
 
Trying to capture mantis shrimps with baited traps is usually unsuccessful. The only surefire way IMO is removing the rock you are sure he is hiding in and quickly injecting a strong shot of very cold seltzer water into his tunnel with a large syringe, or physically extracting them from the rock with a long wood skewer or rigid airline tubing, etc. Some can be very persistent but will eventually come dashing out. Some have also had success dipping the entire rock into a small tub of saltwater at 1.035 or higher.
 
Actually that's how we caught all of the other mantis. This guy is tough though - he's always moving around. From one day to the next I can find him on the opposite side of the tank. If he knows I'm close to him he dashes away to another place.
 
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