ok, i have many questions, so please bare with me. i purchased some florescent ballasts a long time ago, i used one of them with my aquarium. it was a 2x20 watt ballast. i recently purchased another ballast from the same person, and she assured me it would do the same thing. i got to looking at it, and it's much bigger. pictures are at the bottom of this post.
so my questions are:
1. will the larger ballast power 2x 20 watt florescent bulbs, or is it too big?
2. do the ballasts themselves have to be grounded to metal?
3. do i need to use both of them for a total of 80 watts NO over my 10 gallon emersed tank?
4. can you think of anything else i need to know?