pink convicts, dead at 58 degrees.
Texas cichlid - alive at 50 degrees
Rivulus tenuis - alive at 52 degrees
R. birkhahni - alive at 49 degrees
Scriptaphysemion cauveti - alive at 48 degrees
S. etzeli - alive at 48 degrees.
The ones alive were removed before any colder temps happened. The African
killis had trouble though some years at higher temps ( mid to upper 50's)
Badis species other than assamensis ( can't take cold) , and especially
Dario dario ( those dwarf scarlet badis) handle down to the low forites
easy. The Darios can take it to the upper 30's! And were spry and active as
much as the elassoma . I also had troubles other years with Rivulus at
higher temps ( low 60's). Texas cichlids are known to survive much colder
than 50 degrees, I have some still out, see if I can find them yet
hopefully. The pink convicts surprised me, suposedly they can take colder
water. I think the colder it gets, the more that water parameters come into
play. At comfortable temps, fish are less picky about pH and all that. Like
some years the chrysotus have trouble in the upper forties, and other years
are swimming around under a thin sheet of ice. I have had that same thing
with mollies and h. formosa. Oddly Flagfish and bluefin killis shrug of near
freezeing water like nobodys business. L. ommata though are touch and go
once it gets cold, but they are fragile fish in cold water anyways. I have
had elassoma zonatum and evergladei survive all winter here in central
Wisconsin. So far, any sunfish specie I have tried out lived fine, but
dollar and bantam sunfish. That could have been toxic water from dead plants
and leaves stressing them after ice over.
Ray
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