A one minute tutorial to watch and learn quickly
Smelly water is most often a consequence of low sanitiser levels, bad pH management or dirty filters
If the water is smelling than in 99% of the cases you are smelling contamination which is due to low chlorine.
Either that or the filters are very dirty and or your pH is not correct and the sanitizer can't do it's job properly.
Non chlorine shock will break down oils but will not kill bacteria/contaminatio it helps the chlorine to work better so it works great in conjunction with chlorine.
If we assume that you are are using a sanitizer (chlorine or bromine) but it is not working than it would be advisable to use chlorine shock (calcium hypochlorite) first in case you are not using chlorine at all at the moment.
This type of chlorine will work fast but it can be gone quick too in case you have not been using that particular sanitizer.
You should add some and then measure....most likely you will have to use more after that if the chlorine dissipates within an hour or even quicker.
Don’t be afraid to use some more because it will be killing off contamination in the hot tub (otherwise it would be left and you could measure it)
You need to measure some free chlorine after some hours to be sure you are getting there.
- When the water in your hot tub smells musty or stale, then check the basics…. start with the pH level and sanitizer level.
- In most cases you’ll find that at least one of these is not correct.