Everyone over the age of 55 could benefit from this suggested improvement to the old reliable HTH 3-Way Test Kit: put a small hole in the top middle of the plastic test block for an 8' cord (I use "parachute" cord). Instead of having to bend down and get on your knees to sample the water (hard for us older folk) you can then just drop the test block into the pool and then haul in back with the cord for testing. No creaky bending over and getting on your knees. I wrap the cord around the middle of the block when I'm not using it. A real d'uh moment when I thought of this. Or has it already been suggested?