1) Putting fuge over tank is better, but putting under is very good too. With fuge above you save room in fuge for more rock and algae because you won't have to put a devider in for a pump, there's not alot of room in a 10g. Either way will work. Putting fuge above and using gravity is so pods don't have to go through pump to get back to main tank, but I would say most of the pods make it through the pump ok.
2) Alot of people like to use Cheatomorpha(wire algae), it doesn't go asexual and makes a great place for pods to multiply.
2) Alot of people like to use Cheatomorpha(wire algae), it doesn't go asexual and makes a great place for pods to multiply.