I only had my leather for a month, but it regularly retracted its polyps for a day or so at a time. Maybe someone who's had one for longer can let us know if this is something one can expect.
Maybe try moving the GSPs to another location if the cyano is problematic.
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-Quinn
Man, n. ...His chief occupation is extermination of other animals and his own species, which, however, multiplies with such insistent rapidity as to infest the whole habitable earth, and Canada. - A. Bierce, Devil's Dictionary, 1906
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