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Old 08-03-2004, 05:47 PM   #1
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The Freaks come out at night. Crabs, Crabs, and more Crabs.

Hey all,

I am just about ready to add my first fish.
I was leaning toward community fish but now I am not so sure
I am thinking aggressive now.

Last night with all the lights out I searched my tank with a flashlight.
Man do the freaks come out at night.

I found at least a dozen crabs hidding in all the nookes and cranies in the LR. most were small but at least one was a little bigger than most.

I even found one munching on a snail. When I shined the light on him he just looked up and then continued on munching.

I also have a few clickers in the tank, A Mantis or a Pistol. not sure and I cant find him.

I dont want to tear the tank apart looking for hitchers.

Anyway I think it would be close to impossible to catch all the crabs.
I am thinking a few aggressive fish will eat them up for a snack.

I am worried that community fish will get killed by the crabs sooner or later.

What do you guys think? would community fish thrive in this Crab enviornment or just end up as crab food.

Would aggressive fish be better to keep and eventually eat the crabs?

I would like to try coral next year when my tank is more established but not with the crabs in there. if I can have a good variety of aggressive live stock I would go that route, I just dont like to have large fish in a smallish tank. Would they do ok in just a 72 gallon tank?

Any suggestions?

Thanks
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72Gallon Bow Tank | LS/80lbs LR.com Keys LR 20Lbs Base Rock | fluval404 | Remora Skimmer | Red Sea Pro Wave Maker | 4 Maxi Jets 2/1200 2/900 PH | PinPoint PH Monitor | ARTICA 1/10 HP Chiller

Lighting: 48'' Coralife HQI aqualight pro | 2 150 watt MH | 2 96 watt true actinic fluorescents | 3 1 watt blue-moon-glow LEDs

Fish&Inverts: 3-BlueGreen Chromis | Shrimp Goby | Purple Firefish | 6 Line-Wrasse | LawnMower Blenny | Royal Gramma | Coral Beauty | Maxima Clam | 16 Assort. -Snails | LR Hitchers: Crabs, Urchins, Brittle Stars, Feather Dusters, and more

Corals: Assorted Mushrooms | Green Button Polyps | Toadstool Leather | Pulsing Xenia | Clove Polyps | Star Polyps | FrogSpawn | Branching Hammer | Candy Cane | Zoos | Ricordea | Open Brain | Bubble |
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24Gallon JBJ Nano Cube | LR 25lbs Marshall Creek/Tonga/Fiji | 2 Flase Percula Clowns | Shrooms | Xenia | Green Button Polyps | Snails | Hermits
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Old 08-03-2004, 05:55 PM   #2
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I suggest trying to catch the crabs rather then getting a fish that later down the road you don't want

If you know where they live (what rock) you can set a trap by placing a a hunk of shrimp or other fresh seafood in a jar near the rock...the crab will go in to get it but can't get out

another method is to do a dip on the LR if you know a crab is living in it...i've read a lot of different ways to do this, wether it be with fresh water, high salinity or with carbonated water (i would ask or do a search before dipping anything because you can hurt the stuff you want in the tank)

I've gotten lucky and have had my crabs out when the lights are on and have been able to pull out the rock they were on and just grab them off

HTH
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Old 08-03-2004, 06:13 PM   #3
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I think I may try the jar and shrimp method.
I really dont want to start pulling out the rock and dipping.

What kind of shrimp do I get?

I guess I can set up the trap at night and remove it in the morning.
I saw athread with a wine glass and it seemed to do the trick.

Will leaving the shrimp over night affect my water levels?

Thanks
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72Gallon Bow Tank | LS/80lbs LR.com Keys LR 20Lbs Base Rock | fluval404 | Remora Skimmer | Red Sea Pro Wave Maker | 4 Maxi Jets 2/1200 2/900 PH | PinPoint PH Monitor | ARTICA 1/10 HP Chiller

Lighting: 48'' Coralife HQI aqualight pro | 2 150 watt MH | 2 96 watt true actinic fluorescents | 3 1 watt blue-moon-glow LEDs

Fish&Inverts: 3-BlueGreen Chromis | Shrimp Goby | Purple Firefish | 6 Line-Wrasse | LawnMower Blenny | Royal Gramma | Coral Beauty | Maxima Clam | 16 Assort. -Snails | LR Hitchers: Crabs, Urchins, Brittle Stars, Feather Dusters, and more

Corals: Assorted Mushrooms | Green Button Polyps | Toadstool Leather | Pulsing Xenia | Clove Polyps | Star Polyps | FrogSpawn | Branching Hammer | Candy Cane | Zoos | Ricordea | Open Brain | Bubble |
--------------------------------------------------------
24Gallon JBJ Nano Cube | LR 25lbs Marshall Creek/Tonga/Fiji | 2 Flase Percula Clowns | Shrooms | Xenia | Green Button Polyps | Snails | Hermits
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Old 08-03-2004, 06:25 PM   #4
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when i did it and just left it in over night i did not see any change in my levels at all...not too much time for it to start breaking down really

I know other people have done this method as well and its been successful for them

don't be discouraged if you don't get something on the first try though

i would just get some thing that is fresh and wasn't frozen so you know you don't have any sort of preservative or anything in there
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Old 08-03-2004, 06:36 PM   #5
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Yes it's very important to use fresh seafood (and replace it daily if not successful). Otherwise you'll just be feeding the algae.
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Old 08-03-2004, 06:48 PM   #6
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I used the soda bottle trap method. Take a soda bottle (2 liter) and cut off the funnel-like end and maybe cut the pouring spout off if you think your crabs won't fit into it. Stick the top of the bottle facing into the bottle and punch holes in both pieces so tyou can tie it in. Some people just tape or staple it. Then stick any fresh or frozen type seafood into the bottle and change it daily. I got some the very first night.
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Old 08-04-2004, 11:38 AM   #7
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My first attempt last night resulted with Zero crabs.
I noticed my hitchhiking Goby hanging out by the trap for a quick meal.

The crabs will be had!
Tonight we try again.
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72Gallon Bow Tank | LS/80lbs LR.com Keys LR 20Lbs Base Rock | fluval404 | Remora Skimmer | Red Sea Pro Wave Maker | 4 Maxi Jets 2/1200 2/900 PH | PinPoint PH Monitor | ARTICA 1/10 HP Chiller

Lighting: 48'' Coralife HQI aqualight pro | 2 150 watt MH | 2 96 watt true actinic fluorescents | 3 1 watt blue-moon-glow LEDs

Fish&Inverts: 3-BlueGreen Chromis | Shrimp Goby | Purple Firefish | 6 Line-Wrasse | LawnMower Blenny | Royal Gramma | Coral Beauty | Maxima Clam | 16 Assort. -Snails | LR Hitchers: Crabs, Urchins, Brittle Stars, Feather Dusters, and more

Corals: Assorted Mushrooms | Green Button Polyps | Toadstool Leather | Pulsing Xenia | Clove Polyps | Star Polyps | FrogSpawn | Branching Hammer | Candy Cane | Zoos | Ricordea | Open Brain | Bubble |
--------------------------------------------------------
24Gallon JBJ Nano Cube | LR 25lbs Marshall Creek/Tonga/Fiji | 2 Flase Percula Clowns | Shrooms | Xenia | Green Button Polyps | Snails | Hermits
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Old 08-04-2004, 12:31 PM   #8
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If you plan to start a reef down the road, you might want to consider getting fish that are reef safe from the start. It can be a real pain to catch fish with all the LR in your tank when you decide it is time for them to go. Just a thought.
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Old 08-04-2004, 06:59 PM   #9
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Quote:
Originally Posted by lando
If you plan to start a reef down the road, you might want to consider getting fish that are reef safe from the start. It can be a real pain to catch fish with all the LR in your tank when you decide it is time for them to go. Just a thought.
I agree. I dont want the crabs to dicate what fish I get.
Altough the idea of the crabs becoming a snack for a trigger does sound appealing.

I can see it's going to be difficult to get them all out. Just need to be patient.
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72Gallon Bow Tank | LS/80lbs LR.com Keys LR 20Lbs Base Rock | fluval404 | Remora Skimmer | Red Sea Pro Wave Maker | 4 Maxi Jets 2/1200 2/900 PH | PinPoint PH Monitor | ARTICA 1/10 HP Chiller

Lighting: 48'' Coralife HQI aqualight pro | 2 150 watt MH | 2 96 watt true actinic fluorescents | 3 1 watt blue-moon-glow LEDs

Fish&Inverts: 3-BlueGreen Chromis | Shrimp Goby | Purple Firefish | 6 Line-Wrasse | LawnMower Blenny | Royal Gramma | Coral Beauty | Maxima Clam | 16 Assort. -Snails | LR Hitchers: Crabs, Urchins, Brittle Stars, Feather Dusters, and more

Corals: Assorted Mushrooms | Green Button Polyps | Toadstool Leather | Pulsing Xenia | Clove Polyps | Star Polyps | FrogSpawn | Branching Hammer | Candy Cane | Zoos | Ricordea | Open Brain | Bubble |
--------------------------------------------------------
24Gallon JBJ Nano Cube | LR 25lbs Marshall Creek/Tonga/Fiji | 2 Flase Percula Clowns | Shrooms | Xenia | Green Button Polyps | Snails | Hermits
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Old 08-04-2004, 11:31 PM   #10
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Depending on the type of crab, thay may not be all bad. Have you IDed them? Some are algea eaters. Where did you rock come from?
I have 2 Emerald Crabs, one of them is very big and has never bothered anyone.
I recieved 8-10 crabs on my LR, got them along with a few pistol shrimp in a cabonated water dip looking for mantis . A couple were decorator crabs and some I didn't know. I added them to the system, IMO it adds to the diversity to my tank, after all I want a mini ocean. If anyone gets too big or starts causing trouble, I will get him out.
Just another opinion.
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