"Billy" wrote in message ...
"Timothy Tom" wrote in message
om...

|
| The reason that it is useful is that when the power goes off, the
sump
| fills with water. When the power returns, the in-sump protein
skimmer
| will overflow onto the cabinet floor a significant amount of water.

Design problem? Or too much water in the system?

A GOOD design would mean that the display can hold all the water in
the return section of your sump without overflowing. Likewise, the
sump is large enough to hold the water above the overflow. Add a
water level switch to your return pump and no matter what happens
(power fail, return pump fail, overflow fail) you have no water on
the floor.

Tell me about that skimmer? Why does it divert water to the floor
when it come back on, and not into the system?


I am sorry that it is difficult to visualize without seeing it. The
system is designed such that when the pump goes off, the sump does
hold all the water in the overflow box which empties into it. The
problem lies in the fact that the water level rises in the protein
skimmer bubble chamber to the same elevated level in the sump since
the skimmer sits in the sump. When the pump restarts, and bubbles
start flowing into the overfilled bubble chamber this causes a
temporary overflow out of the bubble chamber into the collection
chamber (which fills up the collection chamber and overflows this)
until the level in the bubble chamber drops as the level in the sump
drops.
Once again this is not a huge problem since before getting the UPS,
about once every six months there would be a power outtage, causing
some water to overflow into the cabinet. The majority of power
outtages last for less than 15 minutes, so I have not had any
power-failure related cabinet spills since getting the UPS.

I believe in term of control systems, that this tank is very redundant
in terms of safety control features, with both alarms, and conditional
switching of lights, heater, and chiller based on tank parameters. No
major parameter shifts in 3 years (since getting the aquacontroller),
and keeping my fingers crossed.
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