[They are great and I will not go without them. I'm thinking of putting one on my 20G I just set up!
They can handle 20A and I bought mine from musicfriend.com because at the time they were $19.99 with free shipping.
What Marc decribes is how I did mine. Wood panel with outlets to back of switch panel. Then I have a seperate panel with timers. You don't have to use a panel but if you want timers and/or multiple things on one switch. For me I have all my Calcium Reactor things on one switch. So the feed pump, the recirculating pump, and the CO2 tank solinoid are all on one. That way there is one switch to turn off whole calcium reactor setup.
Another example is the lights. I have my fans hooked up to come on when MHs turn on. The possibilities are endless! Of course you can do the same thing with powerstrips or cheap 3 to 1 adapters but it is not as clean or easy.
Anyway here is a link to page 4 of my thread which gives a better wiring detail, etc.
http://reefcentral.com/forums....umber=4
Pics are in my RC gallery also.
I am pretty good at this stuff (I better be I spent 5 years and thousands of $$ in college learning it (the design part that is. I'm an engineer not an electrician

)) so if anyone needs help designing one just let me know.]
Edited By kwl1763 on 1090250013