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OceanMist 07-09-2006 05:36 PM

Refuge Evaporation
I read somewhere (may have been on this site) that if you install a refuge under the display tank evapouration will occour in the refuge and not the main, is this always the case? TIA

seaham358 07-09-2006 06:19 PM

Where did you read that? I would like to read that, No idea how it would happen ONLY in a fuge.
Seeing the Fuge and tank are hooked together some how both will loose water.
I find it hard to believe that my 24" fuge will evaporate and not my 72" tank.
IMO that info is not correct. Reason being I and others blow fans across the surface of the tank and sumps to lower heat, this causes evaporation which lowers tank temps.

austinsdad 07-09-2006 06:40 PM

If the fuge is serving as a sump also with your main return pump there, it will show evap there first. Yes it is evaporating everywhere, it's just that in the scenario I described above, the main will always have it's supply of water from the fuge/sump - which is where the level will drop before the main. That's where I have my topoff system located, to re-fill the fuge.

MT79 07-09-2006 10:12 PM

In a typical sump/fuge design the evaporation will show only in the return chamber of the sump. This animation may help you understand-

OceanMist 07-10-2006 12:06 AM


Consistent water level - The display tank will maintain the same water level all the times; evaporation occurs in the sump over time (see auto top-off)
Thanks MT79, that is exactly what I read, I did want to bookmark that page but I forgot,

will this only work if you use an overflow? only I can't afford one at the moment and have decided to use a peice of tube to syphon the water from the display?

This would be excellent if the evap does only show in the refuge as I have an auto top off I want to use on my tank and using a siphoning tube will depend on constantly monitoring the water level unless I can install this?

melosu58 07-10-2006 09:13 PM

In my tanks the fuge return chamber goes down.

seaham358 07-10-2006 09:50 PM

I did not understand the question... Agree with the others.. Water evaps from the whole system but the lover water level is SEEN in the sump or fuge.

Using a piece of tube to syphon water sounds risky too me. What happens if you loose power? how much water drains into the fuge before it loses syphon? And when power comes back on and your not home how does the syphon restart? If it wont restart I see some flooding and a dry fuge in your future.. Just a something too look at.

Scoot 07-10-2006 10:23 PM

Some commercial overflows have a nipple on top that you attach to either an lifter pump, or powerhead.

Or you can insert a length of airtubing up into the siphone U-tube, so it sucks the air out (and starts the siphon). That's how Mine is setup. I do have to keep the airline tubing clear of debris...

seaham358 07-11-2006 12:31 AM

they dont have a overflow just a tube, thats the issue IMO

OceanMist 07-11-2006 06:31 PM

1 Attachment(s)

Or you can insert a length of airtubing up into the siphone U-tube, so it sucks the air out (and starts the siphon). That's how Mine is setup. I do have to keep the airline tubing clear of debris...
sounds interesting, could you explain what you mean and how it works?

If the attachment works its my initial design, the pump failing wouldn't be a problem as the siphon would only let 1" or so of water from the main tank which I could allow room for in the 'fuge, or at worst - a minor overflow would occour, however the siphon failing or the pump restarting would be a problem as it would drain the fuge, cause a flood and burn out the pump, (this is why I mentioned constant water level is crutial to avoid siphon failing), can anyone suggest how this could be prevented, TIA

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