I find a 3' to 4' length of 1/4 inch pvc pipe to be very handy to get my water sample. Put your thumb over one end, put the other end in the pool, take your thumb off the end and then put it back. Then transfer your sample to a cup. Kinda cold to be sticking my arm in the pool and saves the knees. You can find the pvc already cut the right length at HD or lowes.
Nice! that sounds like a great idea! Thank you!