I am assuming you mean "coral skelaton" by coral chip unless possibley a frag
. Green algaes are most notabley caused by higher PO4
levels in the tank. I can assure you this is something you do not want. Once established they can be a real pain to get rid of. If you like the green color, try finding some LR
with green coralline and propagate that instead. Much nicer and beneficial to the tank.