Ex. 31.2
I, Charles K. Dargan, II, certify that:
| 1. | I have reviewed this Amendment No. 1 to Annual Report on Form 10-K of BioLargo, Inc. (the “Registrant”); |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Dated: April 30, 2019 | | /s/ CHARLES K. DARGAN II |
| | Charles K. Dargan, II Chief Financial Officer |