Ideal water temperature range
Just been diving in the Philippines... Bucket loads of coral and fish!
My dive computer records water temperature and it registered a range of 28-32degC, with the top 2-3m of water being at the higher temperature end (32degC). That's where we found most of the coral and fish...
Then again, at the lower temperature end (28degC), at 30m there seemed to be similar fish species, albeit a bit larger in size (less variety though). The coral species changed due to the light penetration.
I wonder why the recommended aquarium temperature ranges are what they are? Thoughts?