Estate for years. An estate for years is one which is to continue for a definite period fixed in advance by. agreement between landlord and tenant. The name is somewhat misleading because the period may be for less. than a year, measured in specific days, weeks, or months. Estate from period to period. An estate from period to period (or periodic tenancy) is one which continues for. periods of time (typically year-to-year, month-to-month, or week-to-week) as designated by landlord and tenant. in their agreement. The most common periodic tenancy is the month-to-month tenancy.
You will still require 8.34 BTU to raise the temperature of a gallon of water one degree F. 1  I say approximately because the weight of water varies slightly with its temperature. 2  Water is at its densest at 4 degrees Celsius (39 degrees F). 3  A gallon of water at temperatures above and below that value will weigh less.
The general rule of thumb for increasing your kH is by 20 PPM increments every 24 hours, by adding Â½ cup of baking soda per every 1,000 gallons of pond water. For smaller volumes you would add about 1/4 TEASPOON for every 10 gallons of water to raise the kH 20 PPM.here are many variables that determine fish stocking levels, and they change from situation to situation. They range from one fish for every 25 gallons of water to one fish for every 1000 gallons of water.