What is a federetion?

What is a 725 in swimming? A feeling of water running into your knee inside? Can you use a wire brush on a pebble tec pool? Pool in French? What is a good nickname for Marco? When was scuba first used by the military? How many times around a 18 foot round pool makes a mile? Can you pop your cherry by washing? What is the yearly rainfall in Quinault Washington? How do you filter sand from water? Who is a legend in surfing? Where can one purchase Zoggs Swimming Goggles? Why nitrogin bubbles in scuba diving? Which country discover swimming? Can old refrigerator compressor be used as water pump? I was told that my 30 year old pool was installed without a hydrostatic valve Can a hydrostatic valve be now installed with the pool full or must it be emptied? How much metal chemical needs to be in a pool? How many Olympic-sized swimming pools are in the UK? How many gallons of water are in a 24 foot round pool at 4 foot deep? What flatlands do Pennsylvania have?