http://www.aliexpress.com/item/165W...-Timer-Control-For-Fish-Tank/32378644780.html
I currently have a 20g long and my lights are going out but in the next 6 months I plan to move up to a 55g how many of these would I need for a 55g or can I get away with just having 1?
I currently have a 20g long and my lights are going out but in the next 6 months I plan to move up to a 55g how many of these would I need for a 55g or can I get away with just having 1?

