Solenoid

[bigal12]

hi i have just added plants to my tank and got a dennerle co2 set up with the 500g disposable bottles and i am looking for a closed Solenoid to open when lights are on...
as i am new to co2 set ups i need help in getting one at a resonable price or to make one if possable...
any help would be grate

cheers

 

[bigal12]

just came across this My link would it do the trick?