1) What is PH? What affects it, and what does it affect?
, is the scale used to represent how acidic or alkaline something is. 7.0 is neutral, Less than 7 is acidic, above 7 is alkaline. PH
is effected by many things in the tank, excess CO2
, temperature affects PH
, biological acids in the water affect PH
. The PH
of the water will effect every living thing in the tank. They have evolved to live in a specific ph
range, sudden changes in ph
are very stressfull to everything in the tank as well.
2) What is DkH, and what does it have to do with PH, if anything?
is a measre that expresses the Alkalinity of the water. Alkalinity, simply put is the ability of the water to maintain it's ph
, also called buffering capacity.
Check out this article
for more on alkalinity.
3) Are there iodine tests? What aquarium inhabitants need iodine besides molting inverts?
Yes there are iodine tests, although even the best iodine tests are not that good. IMO
, there are no aquarium inhabitants that require iodine, not even molting inverts. Iodine (at levels greater than NSW
) will not aid in molting it causes molting. Iodine is a poison and should not be maintained above NSW
levels. (I should warn you, the use of iodine is a very hotly debated topic, if you want to dose, make sure you are testing and do not exceed NSW
levels for Iodine .06 ppm
4) What is alkalinity? What affects it, and what does it affect?