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Old 12-08-2004, 02:10 AM   #11
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okay, now do these auto top-offs work well? I wish I had pluming behind my tank that I could tap into. I run a 15ft. R/O water tube from under my bathroom sink(where I installed my RO unit) to my room to do the topoffs. I was thinking about an auto topoff unit, but what happens if it malfunctions and never turns off. Flood right? I'd like to minimize my chances of a flood.

Also, do have an auto top off system, I'd have do dig under my carpet to hide the tubing. If it leaks somewhere, I won't even be able to see it until it's too late. Am I missing something? Seems like a lot of work and hassle and possible disasters. I guess I'm stuck with the daily topoffs. No biggie, I'll just get used to it

Oh yeah, one last thing. Before I converted my 90gal from FW to SW, I didn't have to topoff a thing. I would only do biweekly water changes and this would be enough. Now I know that salinity is not an issue for FW, but I was referring to the rate of evaporation. Does the SW evaporate quicker than FW, or is it the new lighting required by reef systems that causes the evaporation?


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Old 12-08-2004, 05:08 AM   #12
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The lighting generates a lot more heat than a standard bulb, it creates more evaporation.

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Old 12-08-2004, 06:59 AM   #13
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I will only keep about 5 gal of water in my auto topoff container so that even if it should get stuck on, my sump could handle it. (still wouldn't be good, but better than a flood). I have room beside my sump under my tank so hopefully it will be an simple setup. I'm guessing I loose about .75 - 1 gal a day, so i'll just add water to my topoff container every 4th day ish. It's mostly for when I'll be away for a few days. I trust the neighbor to feed them, just don't want them to have to mess with much else.

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Old 12-08-2004, 09:33 AM   #14
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1-2 gal daily.
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Old 12-08-2004, 11:34 AM   #15
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A recommended top-off unit is the Tunze Osmolater, it is an auto top-off unit with 2 fail safes. It uses an optic sensor to determine the water level, uses a float switch for the first fail safe incase the sensor doesn't work, the second fail safe is that after 10 seconds or so the water pump will shut off automaticaly. It also has an audible alarm when the fail safe are triggered.

I was thinking of buying one but it requires that you have a minimum of 2" of space from top rim of tank to water level. That 2" minimun is too much for my setup.

This is the current auto top-off i'm using made by a hobbiest http://www.californiareefs.com/forsale.htm

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