Yes (Code of Jewish law, Yoreh Deah 201:5).
All water is kosher, there's no such thing as 'special kosher water'. A mikvah is simply required to have fresh running water from a natural resource.
Parts of kosher dead animal: parchment and thread made out of kosher dead animal.
Sea salt is a mineral and so long as anything that is non-kosher is not added to the dry salt crystals the salt is kosher. To say that sea salt is not kosher because non-kosher aquatic life lives in the ocean would be the same as saying that all fruits and vegetables are not kosher because they've come in contact with bugs.
It is kosher. Please visit the related link for a list of fish that are recognised as kosher.
When substituting sea salt for kosher salt in a recipe, it is recommended to use about half the amount of sea salt as the recipe calls for kosher salt.
If you are substituting sea salt for kosher salt in a recipe, you should use less sea salt than the amount of kosher salt called for. Sea salt is generally saltier than kosher salt, so start by using about half the amount of sea salt as the recipe specifies for kosher salt, and adjust to taste as needed.
Yes.
May be
The Mikvah is the ritual cleansing of a woman after her period, the reason being that blood is considered unpure and she has just had a period of blood! This article clears up a number of misconceptions about the Mikvah http://tiny.cc/mikvah
Yes, you can substitute kosher salt for sea salt in this recipe. Just be aware that kosher salt is less dense than sea salt, so you may need to adjust the amount used.
Yes, you can substitute kosher salt for sea salt in a recipe, but keep in mind that kosher salt is less dense than sea salt, so you may need to adjust the amount used.
Yes.