Better oxygen exchange

[Stab_Master_Arson]

I have been doing google searches for a product that increases oxygen in the water but have had little results. Is there a product on the market that does this so I can increase bioload.

Also, If I build a sump that is shallow with a humongous footprint thus huge surface area for oxygen exchange will that increase the dissolved oxygen or is there some sort of maximun parts ppm that can be reached or to be safe for fish.