Can anyone explain what is CAST WEIGHT of a fishing rod? i'm gonna buy a fishing rod with these specs :- CAPERLAN brand, full fibreglass rod, 7 feet in length , size: 1.13cm, ceramic guides, polyamide reel seat and metal rings. Ferrule part connectors. EVA handle and 30-50g cast weight, ------ so i wanna know is this a good product for sea fishing and for big fish, what is the maximum weight can handle by this rod, the store guy says i can catch up to 50 Lbs (pounds) max, is it true? please help me...