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.
How to Remove Rust from Old Tools. For those who want to clean rust from a particular object, vinegar is the best solution. Vinegar (acetic acid) removes rust magically, like you see in the pictures. You can also remove rust from bronze objects, jewels, etc. The method is simple: take a bowl, put the rusty tools inside and pour vinegar until you cover them. For objects with thick rust layer you must let the vinegar act up to 2 days. After removing the objects from the vinegar, rust will turn into a viscous film that can be easily cleaned with a strong water jet. If there is any rust left, remove it with a wire brush. Wash the tools with soap and water to remove any remaining vinegar trace. This is the method we used to remove rust from the tools in the pictures above.