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Old 07-17-2012, 03:40 PM   #1
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Smallest heater for a 30g

I've got my sw tank up and running and I currently have a 100w heater. Problem is that it never turns on. My tank stays between 80.1 and 80.6 all day everyday.

I would like to take the big heater out and put a really small one in my ac50 hob refugium. Do you think since my temp never changes that I could go with one as small as a 25w or 50w?
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100g Slightly planted, 6 Platinum tiger barbs, 3 Marble angles, 5 Tourquoise Rainbows, 5 Bosemani Rainbows, 10 harlequin rasboras, 1 Botia loaches, 2 gbrs 2 mystery snails
35g 1 marble gar, 9 BA tetras
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Old 07-17-2012, 05:14 PM   #2
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I don't use heaters in any small tank. Including my sps heavy Solana. I have had to many heaters malfunction and stay on. Unless you have it plugged into a controller its not worth the risk.
If you really think you must have a heater then use the smallest one you can find so when (not if) it fails you will have more time to catch it. I know a few reefers who don't use heaters. Usually room temps along with equipment will keep temps plenty stable
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Old 07-17-2012, 05:26 PM   #3
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Yeah my room is usually 76 and the heat from the pumps and light seem to keep it in the 80s.
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35g 1 marble gar, 9 BA tetras
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Old 07-17-2012, 06:10 PM   #4
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How many degree difference would cause problems in an aquarium?
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100g Slightly planted, 6 Platinum tiger barbs, 3 Marble angles, 5 Tourquoise Rainbows, 5 Bosemani Rainbows, 10 harlequin rasboras, 1 Botia loaches, 2 gbrs 2 mystery snails
35g 1 marble gar, 9 BA tetras
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