It's got an AGM option (with a push of a button you can get to the AGM option and the indicator lights up).I think you may have gottten the wrong charger for your AGM. That is an automatic charger, but it does not appear to be a smart charger. I saw nothing that indicated it has the charging profiles for AGMs, and it only charges at 5amps. Schumacher makes smart chargers for AGMs (they used to make the Odyssey chargers), but that is not one of them. You might want to return it if you have not used it yet.
Nope, it's a starting battery, just happens to have marine terminals on it. No reference to Ah, and judging by the weight, it's probably only about a 55 Ah battery or so.Hmmmm..... Just over a $100? You fuys figure it's worth a shot? Looks like it is a deep cycle....
https://m.lowes.com/pd/Deka-12-Volt-1-000-Amp-Marine-Battery/50183765