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Old 06/15/2021, 02:10 PM   #1
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five.five-six's Avatar
Join Date: Mar 2007
Location: Corona
Posts: 7,794
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How many hermit crabs?

How many hermit crabs should I put in my tank? I just added 250 small-med and am wondering if that was too many.

Originally posted by yellowslayer13:

"I hate that hole"

Current Tank Info: SCMAS Member 225 peninsula euroreef RS180 Apex 400W X 3 20k radiums / Spectra mixed SPS
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Old 06/15/2021, 02:27 PM   #2
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Wow that is a lot of hermit crabs! I guess it all depends on how much alage you have. I have heard 1 per gallon, but that seem like a good start.
It will be the thunder dome when they all start needing new shells

What type did you get?

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Old 06/15/2021, 04:00 PM   #3
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Join Date: Feb 2006
Location: Spokane WA
Posts: 34,536
Blog Entries: 55
I usually go with about 10 to 20 in a hundred gallon tank. But if you have too many, just trade them back to your lfs for, oh, fish food or whatever.


Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low.

Current Tank Info: 105g AquaVim wedge, chromis, royal gramma basslet, tailspot blenny, ocellaris clown, yellow watchman, chestnut turbo snails, bristleworms, couple of hermits.
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Old 06/17/2021, 02:10 PM   #4
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Join Date: Jun 2017
Location: Stockton, CA
Posts: 109
4 Scarlet hermit crabs.
keep track of your friends.

"Your off the edge of the map mate. Here there be monsters..."
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Old 06/20/2021, 01:09 PM   #5
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Location: Grove City, Ohio
Posts: 10,791
I'll only have the scarlet reef hermits in my systems. I currently have 1. It's someplace around 25 years old I think. At least I got it before I got married in 2001. The others all tend to be a little too opportunistic when it comes to feeding time.

I'll try to be nice if you try to be smarter!
I can't help that I grow older, but you can't make me grow up!

Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer
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