For last 3 weeks I have the scaly type stuff shown below in my hot tub. I use bromine and shock to keep my tub clean. I went to store they said liquid shock it and run it for 24 hours. Did this but ran it for about 10 hours. Then put in spa boss spa swirl. Any ideas , thought it was scaling pool guy said could be water mold. Also how do u get rid of it forever , did 2 water changes 3 weeks ago and still in tub ?? any help is good .looks like scales and can't seem to get attachment to post