This may be an old question but I'm still not clear on
when you should drain the tub and fill with new water? Does it matter how much use it gets, or should you change it at certain intervals? Mine has been in for 4 months(new tub) and doesn't smell and looks clear. I'm the only one that uses it regularly (15 -20 min.) a day. I'm going to change it tomorrow just because I think it's time. Also, what effect does the chemicals have on your lawn? Should I use a hose to drain it to the back of my yard?
Thanks,
Tappertee