I run Trojan SCS225 flooded leaded acid batteries and I have followed the specific gravity (SG) readings of each cell of all my batteries and tracked them in a spreadsheet. It is amazing to me to see the individual variability between cells and between batteries. The one additional test I would recommend to you to verify that there is/isn't a problem would be to get a quality hydrometer and test the SG of each cell. I found a bad single cell once on an otherwise normal appearing battery.
