Calcium deposits?

[halefmly]

Well, I needed to use a scraper in conjunction with the acid/water solution, but the efflorescence is now gone. I have been using the aeration method in an attempt to bring down the TA, and it has been hovering around 90 for some time, but today, after a weekend of plenty of pool use and splashing, it is now down to 80.

FC: 14.5 (I have just lowered the SWCG from 45 - 25%)
CC: 0
pH: 7.5
Alk: 80
Cal 470 (that is higher than my usual 420 - I'll recheck)
Cya: 60
temp: 83
Salt: 3000

Thanks to all who have given advice and suggestions in this thread.
Larry