It'd depend on the species, but the blue-leg hermit (Clibanarius tricolor) does perfectly fine in brackish water, and has been kept in as low as 1.008 SG.
Brackish CUC
- Thread starter flossyfloofloo
- Start date
C. tricolor does tolerate a range of salinities. Seawater is still ideal for this species, but it can still do well otherwise.
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Considering tricolor is found in estuarine environments, I'd imagine they "tolerate" brackish quite well. Though I'd admit I've been out of the brackish game for quite awhile, I haven't heard of anyone experiencing any differences between keeping them in brackish and saltwater.
opcorn: still watching . keep discussing lol