suphew Posted June 22, 2006 Report Share Posted June 22, 2006 negligible! you really think they will make that more difference? 0.1 of a degree? if you're lucky? heat from halides, ambient room temperature and fish farts would contribute more to faster heating yeah I think it will make a lot of difference, concrete and bricks, hold a lot of energy I can't see why rock wouldnt be the same and with the water movement in tanks this would quickly go back into the cooler water. Quote Link to comment Share on other sites More sharing options...
lduncan Posted June 22, 2006 Report Share Posted June 22, 2006 yeah I think it will make a lot of difference, concrete and bricks, hold a lot of energy I can't see why rock wouldnt be the same and with the water movement in tanks this would quickly go back into the cooler water. Brick concrete and calcium carbonate have a specific heat capacity of around 0.85 J/g . K ish compared to water at 4.2 J/g . K Which means they hold 1/5 of the heat, than water. Which would mean you would get a LARGER drop in temp if you factored them in. Some quick calculations on a 100 litre tank at 25 degrees 50% volume taken up by live rock changing 20 litres of water with a temp of 15 degrees, would drop the whole tank temp to 22.8 degrees. The difference is tiny, it's not worth the effort ;-) Quote Link to comment Share on other sites More sharing options...
hazymranch Posted June 23, 2006 Report Share Posted June 23, 2006 I just run a bit of hot water in the bath tub and then sit the 20L Jerry cans in there while I vacume/remove the old water. Quote Link to comment Share on other sites More sharing options...
Fay Posted June 23, 2006 Report Share Posted June 23, 2006 Heat to 20 in the sump with 5 heaters when I put through the system drops to about 23 Quote Link to comment Share on other sites More sharing options...
shaneo Posted June 23, 2006 Report Share Posted June 23, 2006 I know its not too related but what temp does everyone try to keep they're tank at ? Quote Link to comment Share on other sites More sharing options...
KP Posted June 23, 2006 Report Share Posted June 23, 2006 Heat to 20 in the sump with 5 heaters when I put through the system drops to about 23 5 100W heaters? :lol: :lol: Quote Link to comment Share on other sites More sharing options...
wasp Posted June 23, 2006 Report Share Posted June 23, 2006 25. A degree or two more is probably better for the corals, but I'm just a cheapskate with electricity. In summer though, when cooling costs money, I'll let it run at a higher temperature. Quote Link to comment Share on other sites More sharing options...
ghostface Posted June 23, 2006 Report Share Posted June 23, 2006 mine sits at anywhere between 23.5 -25.5 in winter and 26-29 in summer. less when the fkn power goes out in auckland :evil: Quote Link to comment Share on other sites More sharing options...
Fay Posted June 23, 2006 Report Share Posted June 23, 2006 5 100W heaters? 300w Quote Link to comment Share on other sites More sharing options...
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