Dr. ron smimek (kendt fra reefcentral, har argumenteret for højere temp).:
http://www.ronshimek.com/salinity_temperature.html
Udsnit:
”Cold Temperatures Are A Problem
Although aquarists are often concerned with the effects of high temperatures, the effects of low temperatures are equally deadly. A recent study shows how differences of only a couple of degrees Celsius determine the distribution of Montastrea annularis populations in the Gulf of Mexico and in the Caribbean Sea, proper ( Carricart-Ganivet, 2004 ). In this case, the no growth lower limit of zero calcification occurred at 23.7°C (74.7°F) in corals from the Gulf of Mexico and at 25.5°C (77.9°F) in corals from the Caribbean Sea. It is worth noting that prior to recent bleaching events that some of the richest coral reefs, often dominated by Montastrea annularis , in the Caribbean were found near Belize. In the mid-1970s, these areas' average monthly temperatures were generally above 29 ° C, (84.1 ° F) and the monthly maximum temperature may reach 33 ° C (91.4 ° F) (Highsmith, 1979a. b; Highsmith, et al., 1983). Montastrea annularis appears to have a center of radiation in the Belize area, as do most other Caribbean corals.
”
Altså væksten standsede allerede ved 25.5c for nogle
koraller, og gennemsnit temp var hele 29c.
Han konkludere vidst, at den "bedste" temp er 82f eller 27,8c for
koraller.