ato and water replacement questions

[larryfl1]

Hey All,

I also posted this on Reefcentral....


here is what i would like to do....

i will have 2 sensors

sensor 1 is low level
sensor 2 is high level

pump 1 is ro top off
pump 2 is empty from sump
pump 3 is refill saltwater from storage tank

normally when sensor 1 senses low level pump 1 turns on to refill until sensor 2 trips...turning pump off...normal ato......

on a certain schedule (daily or weekly) i would like to switch to water replacement....

pump 2 turns on and drains sump until sensor 1 trips...at that time pump 2 turns off and pump 3 turns on to refill sump.... when this completes the normal ato mentioned above resumes...


Can i do this? how

thanks

Larry

[xiaan]

Yes you can! I just did this to set up my automatic water changes.

Check out this post to set it up http://www.aquariumcomputer.com/Foru...hread.php?p=63

[larryfl1]

does the upper or lower sensor trip the ato to run?

if its the lower sensor couldnt your water be down 50% to the sensor drain 50% of the normal drain amount and then add 100% salt water?

so not a 1 to 1 relationship on drain to fill???

if the upper senser triggers ato and there is no differential the sump will always be at the high point when auto water change kicks on forcing a 1 to 1 relationship....

which way does it operate with the config in the link?

[xiaan]

does the upper or lower sensor trip the ato to run?

if its the lower sensor couldnt your water be down 50% to the sensor drain 50% of the normal drain amount and then add 100% salt water?

so not a 1 to 1 relationship on drain to fill???

if the upper senser triggers ato and there is no differential the sump will always be at the high point when auto water change kicks on forcing a 1 to 1 relationship....

which way does it operate with the config in the link?

The ATO operates on the upper sensor. so the water drains to the lower sensor then fills back up to the upper sensor.

[larryfl1]

ok...so the ato only works on upper sensor? ato is not affected by the lower sensor....lower sensor only has to do with drain for water changes

now the next question...which probes are the most reliable??

float, optical or the new external style?

[xiaan]

ok...so the ato only works on upper sensor? ato is not affected by the lower sensor....lower sensor only has to do with drain for water changes

now the next question...which probes are the most reliable??

float, optical or the new external style?

Sorry can't really help you with that I have only tried two float style and had not had any issues with it yet.