Harvey said opposition sides were employing a third man up tactic around the ground with the nominated ruckman’s prime objective being to hold the League's tallest player down.
He said the tactic had emerged last season but went to a new level against Carlton in the side’s NAB Challenge clash on Saturday.
“We’ve gone back and had a look at the tape and it would be fair to say that I’ll be giving Jeff Gieschen a call,” Harvey said on Monday.
“What we’re finding is that a lot of the opposition’s ploys are for the opposition ruckman to hold Aaron down and have a plan for the third man up after that.
"What are ruckmen for? They're obviously there to take the initial contest and let it decide itself after that.
"The umpire's got to make the decision on whether the ruckman is genuinely having a ruck contest."
Harvey said his side had a lot of free kicks given against them at stoppages against Carlton and it was unclear which infringements umpires were giving precedence to around the ground.
With tagging, blocking and the third man up tactic all factors at a stoppage, the coach said it needed to be clearer which out of a number of free kicks is the first paid.
"There are a lot of different elements to it," he said.
"Is it a ruckman not being a ruckman? Do you look for a block, or do you look for a star player not being able to take his place around a stoppage?
"What takes priority?
"It's all those aspects that probably need clarification around stoppages. But at the moment we're finding that it's a ploy to hold Aaron and not necessarily go for the ruck with their No.1 ruckman."
Aside from targeting Sandilands, Carlton also challenged young Fremantle players Nic Suban and Greg Broughton physically.
Carlton's Nick Stevens was charged with striking Suban in the third quarter of Saturday's match and was offered a one-week ban by the match review panel on Monday.
Harvey said his senior players, particularly Dean Solomon, supported their teammates well and the experience would only benefit the younger players.
"Whether they were actually targeted or not doesn’t really faze me as a coach," he said.
"I like to think that our younger players, it makes them grow up quicker (and) makes them understand what the big game's all about."
