Wednesday, November 11th, 2026, 10:17 am
Red-rimmed Melania in Wintertime
Filed under: Red-rimmed melania considered robust
cold winter night is coming soon. Temperatures will go below zero tonight or tomorrow night. Indoors it’ll be cold too (unless heated up overnight; energy is not cheap anymore). The water in the unheated tank is at about 17 degrees (°C) at the moment (early in daytime, it can warm up later). The topical one is somewhere around 25-26°C.
Our red-rimmed melania can tolerate a wide range of temperatures. Wikipedia says, “[a]lthough normally a freshwater snail, this species is very tolerant of brackish water, and has been recorded in waters with a salinity of 32.5 ppt (1,024 specific gravity salinity).”
“It is, though, a warm-climate species. It appears to prefer a temperature range of 18 to 25 °C (64 to 77 °F)[6] or 18 to 32 °C (64 to 90 °F).[7] Research has been conducted to determine the snail’s lethal high water temperature, which is about 50 °C (122 °F).[7] This information is helpful in the disinfection of fishing gear and research equipment, which otherwise may inadvertently spread the snails to uninfested waters.[7][28]”
“This species is resistant to low oxygen levels.[29] Its pollution tolerance value is 3 (on scale 0–10; 0 is the best water quality, 10 is the worst water quality).[30]”
The word “uninfested” is used; Rianne started with only one in her tank, now there must be 30-50 of them. They spread so fast.
