Swimming pools blog

Hello Group,
I have an in ground pool that I use a kreepy krauley in. I have gone
through 2 thrusters in the last several years. The old ones had
adjustable periods and the newer ones do not, but neither seemed to
work very long or very well.
I like the kreepy krauley, but does anyone have any suggestions about
an alternative to the thruster to keep the motions random?
Thanks,
Todd Kroehle