The pool should stay empty for as short a time as possible. When the pool is empty the walls are subject to relativley extreme changes in temperature, compared with the stable temperatures of water. Shrinking and expanding (with temperature changes) of the pool wall surface will result in cracking. You then face the joys and expense of repairing the cracks. The bottom line is: Empty the pool only when you need to, do whatever you intended to do while the pool is empty - and start refilling it immediately.
Just wanted to add that a pool left empty can "float"..that is to say it pops out of the ground, rising above ground level several inches or more. The ground surrounding the pool, especially if it is wet, is heavier than the pool surface, and puts pressure on the pool walls, which could cause tehm to crack, or "float" the pool. Having said that, I had my pool empty for a long time before I had it re-plastered and nothing happened to it. :)
Until you put water in it
Marijuana takes about 2 to 6 weeks (or a month, on average) to completely leave your system.
It will remain effective and you will stay high for a few hours, but the alcohol will not effect how long it is in your system it will be completely out in 2 or 3 days.
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Rechargeable batteries usually last 300 to 500 cycles which is when a battery is at 100%, then is drained to 0% and charged again. Even if you do not drain it completely and recharge the battery, it is still considered a cycle.
bout im not sure
That depends on the amount of power being drained from it.
They don't meet because they are the exact same distance apart of both sides of the line and they are completely straight. No matter how long you stretch them, they will remain un-contacted.
The mare and foal should remain separated until the mare is completely dry. This could take anywhere from 2 weeks to a month.
Until it runs out of gas. * Until the battery is drained.
As long as the hyacinth is planted in well drained soil and a sunny location, it will survive.
as long as you can smell it
Depends on how deep they are and how long you wait. smaller, shallower ones tend to fade to near invisibility fairly soon, but the really deep ones will remain visible.