We were enjoying a fabulous weekend recently until we noticed the water in the hot tub turned a light brown.


As it was primarily contained to the hot tub, we drained the water;(unfortunately through the pool filter, cartridge type) (there was still contaminated water in the recirc lines); scooped out any remaining debris; ( unfortunately there was not much solid left as the hot tub is quite turbulent ); rinsed and refilled.
I have since superchlorinated the water (we have a salt system) and there appears to be no visible discolouration or signs in the water.
We are planning on closing the pool in a couple of days, are there any additional treatments required, additional superchlorination (shocking) etc.... to prepare for the closing ? Will any bacteria, etc.. die over the winter ? Are there any specific treatments or tests to conduct upon opening in spring ?
Thanks in advance for your help !