I hooked up a 1 amp charger on a timer to my battery and set it to go on for an hour every day .Is there any reason not to do this? Thanks

An hr a day could cause  you to have to add water more often. Like was said, 15 minutes a day is more than enough.
Do your battery a favor and buy a 1-2 amp maintainer/float charger, about 20 bucks at WM, or about 7.95 at Harbor frieght. These can be left connected 24/365.

If you have more money to spend, "battery Minder"...or "Tender" has a model that goes into a high voltage "desulfation" mode every so often, and has been known to add much life to even an already sulfated battery.