Jason, I am not sure what you mean when you say you shock it and wait till it holds overnight, then you let it drop to normal levels. How do you hold it and drop it? you mean u run the filter to check if it remains constant and then shut it off?
This is more or less the standard shocking the pool procedure. You raise FC to shock level, test after an hour and raise FC back up to shock level if needed, repeating as needed (which it shouldn't much especially if you start in the evening). Then you leave the pool alone overnight, and hopefully it will still have the same FC level in the morning. If it loses chlorine overnight, raise it back up to shock level as often as practical until the next evening and then do the overnight test again. Once FC holds overnight, you leave it alone and the FC level will fall on it's own due to sunlight.JasonLion said:Shock - Two or three days before closing, I bring the pool up to shock level and hold it there until FC holds overnight (which it generally does right off on the first night). Then I let the chlorine level fall about half way back to normal levels, typically another day and a half.
The only reason I can think of as to why they suggest raising the TA is if one closes with Trichlor tablets in a feeder. If one shocks with chlorine and doesn't use Trichlor, then it is better to keep the TA lower to help prevent the pH from rising too much.RafaelS said:another thing, do you guys raise your alkalinity before closing ? seems my local shop and leslies recommend to raise it before closing, I dont see anything in your post about this.
I am not sure what feeder ischem geek said:The only reason I can think of as to why they suggest raising the TA is if one closes with Trichlor tablets in a feeder. If one shocks with chlorine and doesn't use Trichlor, then it is better to keep the TA lower to help prevent the pH from rising too much.RafaelS said:another thing, do you guys raise your alkalinity before closing ? seems my local shop and leslies recommend to raise it before closing, I dont see anything in your post about this.
What is the return fitting Jason, do you mean the hole in the pool where water jets out?JasonLion said:If there is only one pipe leaving the equipment pad to go to the returns, then they are almost certainly chained together along one pipe run. If there are several return pipes at the equipment pad then that many returns are plumbed in parallel.
A round guess at the distance from the skimmer or return back to the equipment pad (going around the outside of the pool) will do for measuring the pipe lengths. You don't need to be exact.
There is certainly no need to fill the pipes with anti-freeze. 1 gallon for every 15 feet is on the high end. Less will usually be fine, I just like to be conservative. In an ideal world, you don't need any anti-freeze in the pipes, since they should be dry. But if they do fill with water you want enough anti-freeze to prevent the water that does get in from freezing. More anti-freeze is required the colder your winters get. One of the principals of winterizing is that you always want there to be more than one thing preventing damage. That way when something goes wrong you still don't get plumbing damage (which can be very expensive to fix).
Returns can almost always be filled from the return fitting. The pipe should go down at least a little from there. Depending on how your plumbing is setup, there may also be a spot at the equipment pad that will allow you to pour anti-freeze into the return lines, though often enough there isn't.