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.
Gently scrub the paste in a circular motion with a shower brush and rinse clean. It is important to wipe down the walls with a soft clean towel for the best results. Vinegar is another inexpensive and excellent product to cut the fat and remove soap scum and hard water spots in your showers and tubs. Pour white vinegar or apple cider vinegar into a spray bottle and liberally spray the entire surface of your tub or shower. Let the vinegar sit for at least 10 minutes and wipe clean with a sponge of shower brush. Rinse clean and dry with a soft, clean towel.