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For a 2.5 gallon, I would suggest a 25 watt adjustable heater. :) It's worth spending out to get a really good quality one - it will save money in the long term as it will last longer and heat the water more efficiently.

The safe range is 76-85. Ideally, try to keep it between 78 and 82. :) I aim for 80 with my betta tanks.

Make sure you get a glass thermometer to go on the inside of the tank to make sure that the heater is doing what it says it is.
 

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Definitely recommend a 25 watt. I have a Cascade 25 watt and have no complaints. Be warned that any adjustable heater will NOT have a reliable temperature scale on it, so you will need to regulate the temperature until you get a feel for the way the heater works. For example, my tank is at 82, but the heater is set at 86.
I keep my tank at around 82, but that's usually considered to be on the higher side. Rosie just seemed grumpy until I notched it up.
 

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Well, we're glad you're here to learn more! Don't be afraid to ask questions!
 

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Filters are generally recommended for any tank, although I'm not sure what you mean by a "bubbler".
Sand or gravel depends mostly on personal preference, I think. There are advantages and disadvantages to each.
 

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The bubbler is an air pump, it pumps in air from outside the tank through a plastic/rubber hose into an air bar, or head and will create a bunch of bubbles.
 

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Bubbler is not really needed for Bettas since they breathe with their labyrinth organ. Yes I would recommend a filter, also I would recommend cycling that 10g.

Also a good heater brand is the Elite brand, for a 2.5g a 25w would do and for a 10g I use a 100w one I believe.
 

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Ahhh, ok. Well I'd say you'd need a regular filter. The only thing a bubbler would do is kinda mix the water up.
 

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In all honesty, I think a diy sponge filter would cost much more than one bought online, which is like $8
 

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Discussion Starter · #17 ·
Go Gravel!!

Gravel would be the best option in my opinion, just because i read on one of my filters that sand can get in the filter and cause problems. PLUS! Sand is a real pain to clean, it gets everywhere!!!
 

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Adjustable heaters will have a dial, yes. :) Preset obviously won't, but I wouldn't buy a preset.

I actually quite like my sand. I don't prefer it to gravel, though - I like both equally depending on the look I want.
 
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