1.
http://www.aquariumadvice.com/viewtopic.php?t=29498
there is a little neat DIY to try out for you all fish freaks.
It helps the plants and spwaning(very shy, non moving) fish's activity more active.
Looks something like this.
2.
http://www.kaotica.com/frag/diy/moonlight/
another moon-light LED diy.
looks someting like this.
NOW REP ME YOU FISH FREAKS!
btw, i love fishes too.