Hallertauer Hops which is which?

[GARYSMIFF]

Could it be the rice!

[WishboneBrewery]

You think? Could be worth a go I suppose.

[GARYSMIFF]

Rice is nice, I use FUDCO Rice Flakes from Tesco at worse it adds a few points and a very slight taste but not sure how you might do that with a standard mash system.

[simco999]

From the Beer Dudes website

Hallertauer Hersbrucker

Origin: Hersbruck, Germany

Aroma: Grassy, Hay, Pleasant and Hoppy were all used as describers. It has a mild to semi-strong potency.

Alpha Acid: Between 3 to 5.5%

Typical Usage: Aroma

From the Homebrew Wiki

The true Hallertau Hallertauer Mittelfrüher has the mild, pleasantly spicy aroma and flavor described simply as "noble" and characteristic of the great German lagers.

[WishboneBrewery]

Thin mash maybe?

[GARYSMIFF]

Thin mash maybe?

would think you could devise a mash which raises the temp by addition! or get a heat stick and PID and recirc