The pelagic zone includes those waters further from the land, basically the open ocean. The pelagic zone is generally cold though it is hard to give a general temperature range since, just like ponds and lakes, there is thermal stratification with a constant mixing of warm and cold ocean currents.ote: The word kai refers to the ocean and all its parts. Unlike the science point of view where the divisions of the ocean are due to the penetration of light, the Hawaiians division of the ocean depended on the life forms in the depths of the ocean.
Removing Porcelain Bathtub Stains. The most common type of bathtub to get rust stains is porcelain. Porcelain is a heavy stone-like or metal material that is very durable. Since they are so sturdy, removing porcelain bathtub stains can be as easy as using abbrasives on the rust.You can try some abrasive powders such as Comet or Ajax and a scouring pad.Just sprinkle some powder on the stain, add a little water and scrub. This will work for small rust stains that are just beginning.ince they are so sturdy, removing porcelain bathtub stains can be as easy as using abbrasives on the rust. You can try some abrasive powders such as Comet or Ajax and a scouring pad. Just sprinkle some powder on the stain, add a little water and scrub.
Making the world better, one answer at a time. You can get the shine back on an old porcelain bathtub by washing it with an all-purpose bathtub cleaner and then rinsing it clean with water. Next, pour several cups of vinegar into a bathtub of hot water and allow it to sit for a few hours.Rinse the tub with cold water then take a dry, soft cloth to buff the bathtub.aking the world better, one answer at a time. You can get the shine back on an old porcelain bathtub by washing it with an all-purpose bathtub cleaner and then rinsing it clean with water. Next, pour several cups of vinegar into a bathtub of hot water and allow it to sit for a few hours.