Does an algae bloom effect the entire water column?  Just the few feet on surface? How would you fish it? In Cold water. 

The lake I fished today seemed very very pea soupish. Bright bluebird sky. 

The only rig that I know of that comes through relatively clean in algae is the pegged texas rig. I hate algae.

If there is some clean water on top of the algae, you could try floating a weightless plastic on top of the algae to get a strike.