NL50: Valuebet at river with TPMK

[Aquadougs]

Thank you!

I thought a turncheck would induce a bluff from this river-aggro type, which I could call.

Should I ever bet smaller than half the pot at river? Is "at least half the pot" a good standard (especially against unknowns), even if it is a bluff, inducebluff or valuebet, independent of the texture?

I bet that small because I thought that a bigger bet would scare away the middle pairs.