Corals at high temperature (30-32C)

Hey, im planning on a Fish Only tank but would like to add just 1 or two big hardy corals (esp. softies) that can withstand high temp. max 32C during summers and winters as low as 20C. i have two reef tanks, with chillers but i want a FO tank(no LR but dead ocean rock), plain round aragonite 1-2mm sand. the lights will be normal t5(2- 14w blue and 1- 24w 6500k white). Filteration, just 1 itnernal protein skimmer corals im intrested in adding are Toad stool and leather finger or any one of these two. tank- 24"x15"x15". fishes clowns and damsels and a few other nano fishes (no more than 5 fishes that remain under 3").

 

That's pretty extreme. You're best bet would be to find corals from somewhere that were already acclimated to such shifts. That's pretty extreme though... and 32C is probably over the max thermal tolerance limit of most corals. That said, I do have a ricodia that seems to be growing, almost on my heater in one tank. That is probably that high, but it never also gets low like your talking about. 20C is really cold for tropical corals.

 

well i stay in mumbai(bombay) india. and here the temps. are extreme. iv been keeping corals with chiller and no heater. right now my temp. is 22C at night and 24C day. 20C reaches at night during late dec. iv kept my chiller off for now. during april, may, june and early july there are no rains and the temp outside reaches like 36C-38C and so i on my chiller and maintain my temp between 26-27C. I have FW planted tanks and the tanks temp. reach 32C with fans and some times 30C on the lower side max. so if i go for a FO tank, its ok as i keep my surface turb. high for more and fast gas exchange. my plan is to first add a small zoa frag from my other tank and see what happens. OR would a red bubble tip anemone survive such temp?? iv see carpet surviving but its too dam agressive, so dont wana add a carpet.

 

RBTA will survive?

 

That's very doubtful; In fact, I'd be concerned for the fish. You're talking about temp swings from 68F to 89.6F, which is more than a 20F variance; most corals and nems can't tolerate much more than 6F change, and will bleach and die. Furthermore, above 86F, your O2 level may drop too low to support anything at all.

 

An RBTA is probably one of the least likely to handle that. The thermal optima for an RBTA is about 80 deg F and they are actually fairly sensitive to deviation from this.

 

well the temp fluctuates very very slowly and i have seen fish only tanks here in my city without chiller and at these temps. thats why it dosnt have LR or corals so i can turn off the lights. also might add a nano probe chiller in future if possible. all i was concerned was about the anemone or any 1 big soft coral. well even i might shift to leds which also produces less heat. well the tank is going to be in a dark part of my living room so i dont think that the temp might reach so high, but just a thought coz my other two reef tanks that has chiller since begning, the temp use to reach 32C when it was cycling without chiller and lights on for coralline algae.