Entrap monster ability and augment summoning

[LucyG92]

A Mud Elemental has the entrap ability which lists (for Small) a Hardness of 5 and HP 5. Do the listed values change when applying the Augment Summoning feat? I can't find what they're actually based off.

[Cevah]

Mud Elemental, Small: Special Attacks entrap (DC 12, 10 minutes, hardness 5, hp 5)

DC is Con based, and Augment Summoning gives +4 Con, effectivly +2 DC.

Time is not going to be affected.

Hardness is dependent on the material, and only goes up when the elemental is a greater or elder one, so unchanged.

Hp is based on amount. This is affected by the elemental's size, so I would apply a +2 mod per HD.

/cevah