I have a 1 gallon going but it's a tank not a jar for heat I am using the mini hydor 7.5 watt I am finding it a tad to warm but will be moving all to a 2 gal very soon I don't know what to suggest for movement I use a mini hob filter but you would not have room for that I also have led lights watch they are not to strong so they don't cook your corals I do top ups every day had a 1gal a few years back I don't find them hard to keep they arealot offun post some pics of you project as you go along
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Bugsy.... 
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