ScubaD and Robilium,
Heres the autotopoff info on RC:
http://reefcentral.com/forums/printthread.php?s=&threadid=280291&perpage=146
#69585K45 relay, DPDT, 12vdc coil, $7.26
#7122K22 matching socket for relay, $5.35
mcmaster.com
http://www.reefcentral.com/forums/showthread.php?s=&threadid=309128&highlight=auto+top+off
and the diy calc reactor i did is here:
http://www.melevsreef.com/dj88.html
Heres the autotopoff info on RC:
http://reefcentral.com/forums/printthread.php?s=&threadid=280291&perpage=146
#69585K45 relay, DPDT, 12vdc coil, $7.26
#7122K22 matching socket for relay, $5.35
mcmaster.com
http://www.reefcentral.com/forums/showthread.php?s=&threadid=309128&highlight=auto+top+off
and the diy calc reactor i did is here:
http://www.melevsreef.com/dj88.html