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#1
11-21-2011, 04:17 PM
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Evaporation - what is a reasonable amount
I'm noticing that I'm losing almost a gallon of water a day to evaporation out of my tank (55gl).
I've got a DIY HOB refugium, which is throwing a lot of bubbles back into the tank, causing some splashing, nothing on the floor or anything like that, a bit up on the lights. I've got the pump turned as low as possible. I was thinking about grabbing a filter and directing the water into the filter, then back into the tank to see if this will help. Any suggestions or ideas or is this acceptable water loss? 
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#2
11-21-2011, 04:24 PM
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I'd say that is normal. It really depends on the open surface area of open water. I have a 30 gallon 24 X 24 with a completely open top and I loose that much easily in a day.
If you had glass tops, they help with evaporation, but then oxygen exchange gets lowered as well.
__________________
 They call it addiction for a reason...
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#3
11-21-2011, 04:31 PM
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Yup mucho mucho water. Im a 5G pail every 4 - 5 days, 28G with open top.
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#4
11-21-2011, 04:35 PM
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Thanks for the replies! Seems like its more now than it was in the summer, the HOB fuge has made a difference. Won't worry about it for now. Guess I should test the salinity swing though, but I would think it shouldn't be too much. I topped up this morning, so will wait until tomorrow.
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#5
11-21-2011, 04:36 PM
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Your best investment will be an auto top off.
It's the best thing I ever did.
__________________
They call it addiction for a reason...
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#6
11-21-2011, 04:37 PM
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It is soooo dry here in Calgary, evaporation is going to be pretty quick. I lose nearly a gallon a day out of my FRESHWATER tank I keep upstairs. It drives me nuts that I have to do the bucket brigade on this tank whereas in my basement where I keep my salt tanks the topoff is all nicely automated. Family won't let me get rid of the freshies though, they consider that "their" tank (even though I seem to be the one carrying the buckets.. I'm not sure what's up with that, but I guess I digress.)
Anyhow I would agree that your evaporation losses sound pretty normal to me.
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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#7
11-21-2011, 04:39 PM
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My 77 with open top evaps about a gallon/day, so your numbers are comparable. How's the humidity in your house? If dry, which is typical in many colder regions of our fine land in the winter, that will contribute to a bit more evap from your tank. Also if you have any fans blowing for lighting, that will contribute to additional evaporation. I doubt that adding a filter will change the evap rate that much.
__________________
Mike 77g sumpless SW DIY 10 watt multi-chip LED build  http://www.canreef.com/vbulletin/showthread.php?t=82206
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#8
11-21-2011, 04:48 PM
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On a hot day in the summer on my 125 I have font through 3G in one day bud! I have a 125 with a open top and a 60g sump open top! I just added a 30g frag tank with a 400w de mh with a open top aswell and I'm going through a 6L a day..
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#9
11-21-2011, 04:50 PM
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Quote:
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#10
11-21-2011, 05:08 PM
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The house is not humid at all and with the onset of winter, my skin says its dry in the house. No fans on the lights, guess I'll be making a ton of water....ah well.
I'll set up an ATO when I get a bigger tank set up. For now, not a lot of effort in maintaining the water levels, but I'm sure that will change once I go bigger hopefully sometime in the next year  . Funny how family tanks, pets, etc are manditory, but no likes to help with the maintenance...same in my house....thankfully my ro unit is in the kitchen 5 feet from the tank so not a lot of hauling to do.
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