I was at the S/H supply today and I was talking to the counter clerk about winter cleaning. He recommended Dura Chlore by Alden Leads. He said it is a finer mix and shouldn't leave a film if mixed correctly. Has any of you guy tried this stuff. www.aldenleeds.com
Dura Chlor
57% Sodium dichloro triazinetrione.
35% Available chlorine.
1/2 - 1 ounce per 1,000 gallons to chlorate.