Vitor,
With the cold weather, I imagine the fuge temp -- the air at least will be quite low (just above zero?) -- is it affecting the mangroves at all?
The roots will be safe of course, but I would watch the plants leaves don't drop off into the water.
Now I know sweet 'hmm hmm' about mangroves, but I imagine they would not be used to such temps coming from the tropics?
Monsieur Google says:
http://www.cru.uea.ac.uk/cru/tiempo/...0/mangrove.htm
Quote: "Frost caused by low temperature damages the mangroves in the north of Vietnam, especially on days with a low tide. On January 17th and 18th in 1961, for example, it was recorded in Quang Ninh that a number of mangrove leaves became dry and died when the temperature fell to below 2°C."
If the leaves fall off, I would remove them quick sharp from the fuge.
My cooker in the garden shed is keeping the temp @ 26C -- but I check it every day -- Hmm, I wonder if its even necessary to maintain reef temps just for LR cooking? hmmm.
I shall ask Monsieur google...
regards
Conor.