I moved into a new home a little over a year ago. O how little I knew of what I was getting myself into. 1990 home with a large concrete pool with a deep end, when we purchased it was a beautiful blue, I have no idea how the old owner could have kept it up. This summer I have just finished swapping a 30 year old heater, new electrical, auto timer installed, new gas piping completed, and finally switched an undersized cartridge filter system, a Tropic Flo metal canister that drove me nuts constantly cleaning it, for a sand filter that I put glass in. Finally here I am with the right equipment, I gotta master the chemistry. I have lurked here prior but saw the discount on the testing kit so I became a supporter and am going to learn the TFP ways!