fake live rock

hi there i know you can put fake live rock in a reef tank

but i got a few questions about it





1 if live rock is your filter what would you use for filteration if your using fake rock ?



2 whats the pros and cons of using fake rock



any body got a tank with fake live rock in it ?



3 would all your snails and stuff clean it like normal live rock and



4 would you need to do anything to use fake rock or would you just put it in tank and then let it cycle ?



also is it possible to use ocean rock in a reef tank cause i like they way its looks with big holes in it and that and it been white



tia for any answer with this