Well thanks to Zhenya I feel more at ease.I can only put my high alk levels down to the Reef Crystals.
I made up a new salt batch in my mixing tank and checked everything.
The R/O was fine
Temp 80 Ph 8.3 - salinity 1.024 - Calc 430 - alk11.2.

If I set the salinity at 1.022/3 the alk read 13.5
In my previous set ups I always used Kent salt and the calcium and alk was always on the low side, which was fine as I could raise it to appropriate levels with kent A&B.
As I said the tank is settling down and I will let it run its course for a week.
Readings at present are.

New tank set up
Alk 11.2
Calcium 390
Ph 8.4
Ammonia 0.25
n/rate 2.5
n/rite 0.0
skimmer running
wet&dry Rowafoss only
Temp 80
One last thought. If I add Kent A to raise calcium levels to 420 will this effect the Alk level and which way???
Thanks for all those who helped especialy Zhenya.
Any comments most appreciated