How much calcium is recommended?

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Maddamay32
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How much calcium is recommended?

Post by Maddamay32 » Fri Aug 16, 2019 10:37 am

Every day I give egg shells to my crab's as their main source of calcium but I was wondering if that is enough for them? Or should I also be giving them calcium carbonate? I'm aware that crabs like variety and have purchased some exo from TheHealthyHermit as well as looking into my other options.
Basically, I'm wanting to make sure that what I'm using would be enough for my crabs or should I also be substituting with calcium carbonate because it's so concentrated? Thank's much for any replies!
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Re: How much calcium is recommended?

Post by Hermiesguardian » Fri Aug 16, 2019 11:25 am

I always have a cuttlebone in their tanks. I also sometimes scatter crushed oyster shell. And give them eggshell every couple of weeks with their food.
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Re: How much calcium is recommended?

Post by curlysister » Fri Aug 16, 2019 1:22 pm

I also keep Cuttlebone in the tank all the time. I give eggshell now and then, and a 'calcium mix' I ordered from Chubby Crab or from HCP.
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Re: How much calcium is recommended?

Post by PinchersAndShells » Sun Aug 18, 2019 11:26 am

Like the above, I also have a cuttlebone in the tank at all times, I’ll also offer things such as eggshells, cicada shells, oyster shells, etc. on occasion.
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Re: How much calcium is recommended?

Post by Motörcrab » Sun Aug 18, 2019 1:09 pm

We keep a calcium pit/ dish, in our tanks at all times. Depending on it's location in the tank it may last a week until it needs to be changed. We rotate through 3-4 of these options every few days. egg shells, several crab exo mixes, crushed cattle bone, several powdered fish bone mixes, different sizes of oyster shells, calcium carbonate and azomite. We will also toss in some type of flowers to give off a smell. Our crabs seem to really enjoy the variety.
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Re: How much calcium is recommended?

Post by Pincher » Sun Aug 18, 2019 11:08 pm

I always have a dish (a large seashell) filled with small cuttlebones, crab exos and small seashells (I can get them from the beach), and I leave it in until it's mostly eaten up.
I occasionally put in an egg shell with a bit of left raw egg when I prepare eggs for myself.
The crabs enjoy it and appear really healthy with a hard exoskeleton (I don't handle them, but I had to pick up one guy a few days ago). We never had any problems regarding molting/health.

In addition to the egg shells you mentioned as main source, I would add some marine sources, such as cuttlebones, tiny sea shells and - if you can get them - crab exos. If you don't live by the sea: cuttlebones are available in the bird aisle of most pet stores, tiny seashells/ puka mix are available in the fish aisle. Don't use puka mix from craft stores as it's often dyed. Crab exoskeletons are harder to get when not living near a beach; I would not use exoskeletons from prawns (the leftover shells from a seafood dish for humans) and so on because they are likely treated with antibiotics.

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Re: How much calcium is recommended?

Post by GotButterflies » Mon Sep 02, 2019 4:47 pm

I personally always keep calcium choices available for crabs. I keep a calcium dish and cuttlebone available at all times. :)
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