I used to give frags to a friend who kept a tank with halides and no fans or chiller. He kept the windows open during the day and it was 90 degrees outside. When I broke the tank down with him the water was so hot it was almost uncomfortable to pull rocks out. The fish and corals were fine. The acropora was tan but when I put them under blue light at my house the tan areas were swirled with fluorescent pigments and they looked amazing. The corals were growing too and this makes me wonder if keeping higher temps can make corals color differently.
I don’t even want to think what the low point of temp was on that tank. I would guess the temp would go from 76 to some days 90 degrees or more. That’s a huge temp fluctuation but the corals were “ok”. Most wouldn’t believe acros can live through this. Honestly I didn’t until I went there to break the tank down with him and now I am intrigued on how to develop those swirly fluorescent pigments without raising temps that high.
I don’t even want to think what the low point of temp was on that tank. I would guess the temp would go from 76 to some days 90 degrees or more. That’s a huge temp fluctuation but the corals were “ok”. Most wouldn’t believe acros can live through this. Honestly I didn’t until I went there to break the tank down with him and now I am intrigued on how to develop those swirly fluorescent pigments without raising temps that high.