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I have a Sundance Altamar hottub which is inside my garage. My water is about 1 month old. Last week I went away to see a friend and didn't use the tub for about 3-4 days. Everytime I am done using the tub I put about 1/2 TB of Dichlor in there. Then I shock the spa once a week with MPS.Well when I got back from my trip I opened up the hottub cover and the water had this distinct smell to it.. almost like a chemical smell but sorta weird. Not your typical Ozone smell. The water also looked a little cloudy. My PH was around 7.5 and my Alk was about 120.. so really not too bad. Anyhow, I put some more Dichlor and MPS in there. Now a couple days later I still have this smell. so then yesterday when I was opening up the cover I noticed what looked like black mold on the underside of the cover. I have no idea how I could possibly be getting black mold on the underside of the cover... So I took some diluted bleach in a bucket with a towel and wiped down the whole underneath of the cover.But the water still has this weird chemical type of smell to it which I never smelt before. It's not like a Chloramine smell.. it's just a different smell.. sorta hard to explain over typing..Anyhow.. would anybody know why after only a few days being closed up the tub could get a smell to the water and I could get black mold on the underneath of the cover?Thanks!
okay... about how much dichlor should I use to get to that 10ppm+ level? the tub is 375 gallons..also how long after I do this should I be able to reuse the tub in?
if you add dichlor or mps and just close the cover after adding it, will the chemicals actually eat away the cover
if you add dichlor or mps and just close the cover after adding it, will the chemicals actually eat away the cover or do some other damage to the tub?and how about off gasing? if the cover is closed can the chemicals even work?
My understanding is if you have the cover on when shocking, the off gassing materials have no place to go but back into the water. Is this true?