heater question

[Brains]

Alright so my eheim heater sucks. I knew it wasn't submersible, but I thought it would come with some sort of thing to attach to the edge of the aquarium. Well there was this one part, but it wasn't identified in the instruction manual so I threw it away like a dummy haha. Anyways the suction cups came unsuctioned and the non submersible heater become submersed. Thankfully I noticed before it was completely destroyed. Although it did make a weird sound while under the water, so I am a little afraid to use it again. ANYWAYS, long story short I have an extra 200 watt heater laying around that I used for my 60 gallon. My question: will using the 200 watt heater for my 10 gallon betta tank cause any sort of problems? I know I have a ridiculous 20 watts per gallon, but will this cause any harm? Thanks for your help

[Brains]

Maybe this was a dumb question......everything seems to be working fine so I guess there is no harm :)