Physical- Color of water O - almost transparent -E- Slightly colored due to high concentration of Plankton.
Light penetration in O- Substantial -in E- quite lesser that of O.
Electric conductivity - less in O - Higher in E.
Chemical
Do2 in O Lesser than E During Daytime, O less Acidic then E During night time.
Hardnesws in E more than O.
Equilibrium Co2 always used up E, But not in o
