Brackish fiddler crabitat - The Planted Tank Forum
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post #1 of 32 (permalink) Old 12-08-2013, 10:34 PM Thread Starter
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Brackish fiddler crabitat

A customer brought in a fiddler crab to my LFS because they bought it from Petco and didn't realize what it was and what its needs were. So I picked it up for 3 bucks.

I did some research about them and found there to be very little information or photos of fiddler crabitats. I had a spare 10g tank sitting around so me and the woman threw together something we thought would work (its gonna be her pet ).


Started out with a glass divider in the 10g to make a wet and dry side.


This is where I stopped taking pictures lol. We got too engrossed in setting it up that I forgot to take pictures of the progress. We siliconed lava rock to the wet side of the divider in a slope so the crab would have a way to get up to the dry side. I've heard they don't like to climb. In the dry side I also put a little glass 'planter' that I had made a while ago for a wabi-kusa setup but never went through with it. I want to add some terrestrial plants in that section, just gotta find something suitable. I also added a driftwood log in the wet section to give him another alternative to the wet/dry transition.

Excuse the plastic plant. Its just a temporary place holder










Filtration will be via a tetra 2-10 in tank filter. I located the filter so it creates a little bit of a water fall.

Salinity is set to about 1.008

Any input would be appreciated. This is my first dive into a brackish setup. I'm looking for plant ideas that would go well in here.
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post #2 of 32 (permalink) Old 12-08-2013, 10:40 PM
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Nice rescue!


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post #3 of 32 (permalink) Old 12-08-2013, 11:55 PM
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Nice little set up there. My experience from catching fiddlers for bait is they live in the tidal zone. Sandy wet mud usually in and around transitional grasses. Some mondo grass might make him feel more at home. Cool little critters to watch, get him a mate.

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post #4 of 32 (permalink) Old 12-09-2013, 12:09 AM Thread Starter
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I wish I could get my hands on some tidal mud. I might just flood his 'dry' area to attempt a muddy area. They're only like 3 bucks at petco so I might try to find a buddy or mate.
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post #5 of 32 (permalink) Old 12-09-2013, 12:30 AM
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If fiddler crabs act anything like red clawed crabs, your plants won't stand a chance. My red clawed would shred plants in no time flat!
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post #6 of 32 (permalink) Old 01-02-2014, 07:39 AM Thread Starter
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I'm working on crabitat v2.0. I just picked up a couple of 20g long tanks and one of them is going to be a crabitat. Not sure about the 2nd. Probably a remake of my current shrimp tank.....
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post #7 of 32 (permalink) Old 01-02-2014, 08:48 AM
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That looks amazing nice work and good on you providing a home for the fiddler crab.
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post #8 of 32 (permalink) Old 01-02-2014, 10:01 AM
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You could try clay/sand mix for a tidal mud
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post #9 of 32 (permalink) Old 01-02-2014, 09:46 PM Thread Starter
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Quote:
Originally Posted by water hyacinth View Post
That looks amazing nice work and good on you providing a home for the fiddler crab.
Thanks!

Quote:
Originally Posted by scotty b View Post
You could try clay/sand mix for a tidal mud
That's a good idea. I'm tossing around some ideas on what to do. There is very little out there on ideas for fiddler crab habitats. Version 2.0 will be much better and the 20 long will give me a much better area to set up and play with.
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post #10 of 32 (permalink) Old 01-02-2014, 11:17 PM
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I used to have a few. I used a lot of sand so that he had around 4" of water in the deep part, then a sand slope, then an area that was wet sand. There was no divider or anything similar, and the crab would make finger-width burrows in the wet sand. No rocks, just a few random seashells. I'd suggest making the dry side nice and wet so that the crabs can make burrows.
Oh, just to warn you; I ended up with mosquito larvae in there. Scooped them out and made them fish food. Keep an eye out for skeeter larvae, and if you see them, just swish a net through there and dump the buggers into a tank with a fish. You've got a week or two before they turn into adults, so they're great fish food.
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post #11 of 32 (permalink) Old 01-02-2014, 11:25 PM
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I bought "star moss" once and of course it didn't work under water and I soon found threads that said most have
trouble growing it underwater. But then I started noticing it on top of the ground around the streams that I collect from.
So try it on the "dry" side. But it grows in damp soil.

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post #12 of 32 (permalink) Old 01-03-2014, 12:43 AM
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Star moss is just that moss stuff that you see on the ground. Go to a river and pick some up from the banks... Although I'm not sure if it'd like the brackish water.
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post #13 of 32 (permalink) Old 01-03-2014, 01:02 AM
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ive hers java moss can work in brackish
also some micro algaes will work in brackish
look at special kitty natural clay litter for "mud"
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post #14 of 32 (permalink) Old 01-03-2014, 02:33 PM
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Not suggesting you buy from them/your choice, but it's just a list of plants that work in brackish water.
Just starting in plants so I can't verify which would grow above water.
http://www.aquariumplants.com/Bracki...lants_s/22.htm
Put your pointer on "Aquarium Plants" for pop out list to be sure of brackish type.

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post #15 of 32 (permalink) Old 01-03-2014, 03:14 PM
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This is probably the best and most natural setup I've seen for fiddler crabs. I once kept a few in a half filled 10 gallon tank with brackish water, and they did very well for a long time. I only provided rocks and floating cork bark for land, but I think they definitely would have preferred burrowing space. The only reason they died was because I got tired of making brackish water...they really don't last long in freshwater.
I would recommend putting a layer of lava rocks under your sand to help keep the substrate aerated and from becoming anaerobic.
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