Hey, this sounds great - with aquariums, there's a lot of chances for water to get everywhere

so having a remote head unit may make some things a bit safer (could control the lights and mount the head unit in the canopy, then SAFELY control the pumps, etc.
I'm very interested anyway.
BTW, slight change of subject, if I used the DB9 cables, how far can you mount the current expansion relay box? I have only a 2" tube to fit all the wires into the aquarium from above (it's an island).
== John ==