So i have a ten gallon nano recently setup from my bigger 50 gallon tank. same water and a filter pad i used in my sump.

my question is: I have an Emperor 400 on it now and a powerhead for more flow. now i have a red sea Prizm skimmer that i recently took off my 50 gallon because i got a new skimmer for it. should i use the Prizm on my 10 gallon or just keep the emperor 400 on there?

and both of them wont fit.