Thanks for the reply.
You are right regarding me using the hydrometer again after I had added the sugar...lesson learnt by me as a newby ;-)
Are you sure ref
With the amount of sugar you added I come up with a SG of 1.065
Using this table
SG 1045 5.8% 120g per litre sugar
SG 1050 6.5% 132g per litre sugar
CG 1055 7.2% 145g per litre sugar
The difference (per litre) is 120-145 = 25g of sugar per litre
25g x 25 litres = 625g
I added 550g (22g per litres) so am presuming the SG would have gone from 1.046 to approx 1.055 (mayby a little less)
So if we work on 1.055 as a guess, that means the SG today at 1.021, that means alchohol is approx 4.8%
Is my reckoning correct?