Apex Classic Setup and Programming Guide v2.2 Page 100
If Temp > 78.0 Then OFF
Chiller <Real Outlet 6>
Fallback Off
If Temp > 79.0 Then ON
If Temp < 78.0 Then OFF
CO2 <Real Outlet 7>
Fallback Off
If pH > 8.00 Then ON
If pH < 7.90 Then OFF
Ozone <Real Outlet 8>
Fallback Off
If ORP > 375 Then ON
If ORP < 360 Then OFF
AUTOMATIC TOP OFF
The AquaController Apex can be used to automatically add top off water to your
aquarium through controlling a top-off pump based on the state of float switches
in the aquarium sump.
A top-off pump should be selected to pump 1.5 to 2 times the daily top-off needs
of your aquarium. For example, if your tank needs 5 gallons of top-off water per
day, you should find a pump that can pump 7.5 to 10 gallons per day. Consider
peristaltic pumps, diaphragm pumps or very small power heads with ball valves
limiting their output. Don’t forget to take into account head loss when selecting a
pump.
The size of the top-off water reservoir should be selected to contain 5-10 days of
water to minimize the refill frequency. It is strongly suggested that top-off
systems not be connected to an unlimited water supply to avoid adding too much
water in the case of a float switch or system failure.
Inexpensive float switches are available from many local and on-line sources.
Some are available with mounting hardware, some come with just the raw
switch. For this project, we will use 2 float switches, one to indicate Sump_Low
which indicates top-off water is needed and Sump_High as an alarm to indicate
that something has gone wrong and the sump is over-full. Optionally, you could
add a third to indicate when the sump is too low. Build a mounting system with
switch Sump_Low right at the water level you would like to keep your sump and
Sump_High mounted 1 or 2 inches higher. These should be normally open
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