Is this one of those instances where someone will keep asking questions until they get the answers they want?
But will it have any bad effect like...restriction or something like that ?
please help me with this thanks!
No, but it's a pain to get these on and depending on how much force it actually took, you can crack the pump housing by forcing the tubing on. People that run smaller tubing on larger ID fittings usually use 7/16"ID tubing on 1/2"ID barbs or 3/8"ID tubing on 7/16"ID barbs...a difference of 1/16"ID...not 1/8"ID.
Tubing is cheap- save yourself the headaches (and future arthritis) by getting the correct tubing ID size for your loop.