no yeast sponge and salt relation

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I have a nice active sponge that will double upon feeding in a couple hours.

I use it mostly for a multigrain loaf bread.  PBJ.

I had been weening the doughs off added yeast as the sponge became more potent.

I'm at the point where I think my sponge has enough gas in of itself to rise the bread.

Normally I add 2.5tsp salt to a loaf.  Should I use less salt when trying a no added yeast loaf?

2c sponge, 2c bread, 2c combined rye, ww, oats, 1/4c each of buckwheat and teff.

5Tbsp combined wheat and rye berries and black rice.

Gluten, malt powder, malted barley syrup.