Hi All,
I know theres many questions about this and I have search but...
Heres my problem, I bought a madelaine hygro, salt tested it, 24hrs 47%

Put another Hydro with it 12hrs, madelaine 48%, other 36%

Changed the battery salt tested, Madelaine 24hrs 59% and has been that way for 48hrs.

Can I just keep this hygro and do the math?(Idon`t mind doing the math)

or the difference is to large and I should change it?