Mike - different brand of heater, according to this video it was a Cobalt Aquatics Neotherm heater that blew up in his ray sump.
Oh ok, sorry @ryanseveMike - different brand of heater, according to this video it was a Cobalt Aquatics Neotherm heater that blew up in his ray sump.
Mike - different brand of heater, according to this video it was a Cobalt Aquatics Neotherm heater that blew up in his ray sump.




Here in Panama in the lower altitudes the water temps are low 80s to high 70s, although night temps drop. I believe the water cascading from the mountains hold temps to those levels, because temps in the highlands are on the cool side.
That's a bit of an inherited misconception for even wild fish. It is true of wild Heckel and green discus, but field observers like Heiko Bleher report red/blue discus in pH up to 7.8.