we tested the grounds in both transformers (300w each) 2 x 300w pool lights.
and tested the junction box cover for ground problems and nothing.
both lights even when off are shocking swimmers. if there is no current going to the lights then how can swimmers be getting shocked? also both lights are on 1 timer. could the timer be faulty and current still be flowing somehow to the lights? but they would be on though?? of course in the daytime its hard to tell.