A SENIOR detective has described an alleged marijuana operation on a rural Fraser Coast property as "the best set-up" he had ever seen.

This is after a raid allegedly revealed a sophisticated drug farm at Torbanlea.

The large hydroponic marijuana production system boasted a shed allegedly containing a stash of about 380 plants.

According to Detective Senior Sergeant David Harbison there were also outhouses suspected to have be used for growing seedlings as well as loose marijuana, evidence of a previous crop.

About $10,000 cash was also confiscated at the scene.

"This wasn't a backyard operation, this was purpose-built for growing marijuana... it was a commercial operation," Det Snr Sgt David Harbison alleged.

Three people have been arrested on drug related charges including possession and production of dangerous drugs as well as being in the possession of an alleged 'recipe book' on how to grow the drugs.

Police raided the rural property on October 1 when they received a tip-off from members of the public who noticed "something was not right" on the land at Joynsons Rd.

"There was a couple living on the property that was purely set up for production. It was a sophisticated operation with huge costs that must have been a big investment," Det Snr Sgt Harbison said.

Mai Doan ,34, and Tan Phat Nguyen, 35, appeared in Hervey Bay Magistrate Court yesterday.

The couple have been released on bail undertakings and requested to leave the state and reside with family in Sydney.

The case was adjourned until October 31. A third accused, Linh Chi Nguyen, was granted bail of $40 000 on October 3.

Det Snr Sgt Harbison said police would allege the group, who were not locals, had been producing marijuana for the past 12 months.

He thanked the members of the public for coming forward and helping police with the case.

"This operation could've been ongoing for years to come and I'm glad we were able to intercept it," he said.

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