Shouldn't be too bad. [She turns it over in her hands a bit. It might need a bit of retooling since none of these parts are waterproof and might end up rusting if left in his tank. She'd have to start from the beginning but the possibility doesn't bother her at all. Having a set goal felt nice, doubly so when it was something of an unknown one - she'd have to learn a little more to pull this off even somewhat effectively.]

It already had an air filter, but it probably needs to be stronger, and it can't be so rough that it harms the glass, either.

[Granted, his tank is probably very durable.] If I give it a little home pad it can get out and rest there when it needs to charge or have the filter cleaned, too ...

[Excuse her, Boxer, she needs her sketchpad back, and thank goodness she's already got a pencil out. Just - a minute or two, that's all she needs! Some of this is really good and should be examined later!]