The size of your pool in gallons = 4000
If your pool is an AG (above ground) or IG (in ground)= IG
If it's IG, tell us if it's vinyl, plaster/pebble, or fiberglass=PEBBLE
The type of filter you have (sand, DE, cartridge) and, if you know, the size, model number or flow rate of the filter.=150 SQUARE FOOT PENTAIR CARTRIDGE
If you know, please tell us the size pump in HP. Also mention if is it a two speed or variable speed pump.=INTELLIFLO VARIABLE SPEED PROGRAMMABLE PUMP
Date of pool build/install, particularly important if less then a year old. FEB 2013
Other significant accessories or options, such as a spa , SWG, or cleaner =SWG
How long and at what speed should I run my pump each day for optimum chlorine levels?