Little gIaNt'S??

HI When I bought my 105g set up from a friend I also recieved boxesmof misc. ok, so I have two little giant pumps one looks like ones I've seen in pics online and it has a
# MD-1 whats that mean and what kind of flow does it have, The other looks bigger and has the # 3E 12N
I the first one is the one that was being used on the tank Also want to know if any one thinks it woould be OK to split the return once to feed a little to my refugium then split in to two 3/4" or 1/2" lines with a black flexi end in the tank, would that give the tank some good flow?? :confused:
I do also plan on using some power heads for more flow
 
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