Re-arranging aquarium

[danben]

Okay so I just recently bought a new aqurium from my friend (5 gal) and stuck my betta and goldfish in there for now (they've been together for the past 3 months or so and no issues so far), but I also just got a few new additions to my 10 gallon such as a bubble/led light thing that's flexible as well as minor other stuff.
My question is, seeing that I need to re-arrange my tank to fit in the new stuff, how should I do it?
Because when I would make minor changes I would just do it while doing water changes but if I need to make a larger change I'm assuming I would need to remove my fish and bag them, drain it almost completely, and then change the stuff, then re-fill it, but this seems like a bit of a hassle, suggestions?

 

[emerald76]

I would do that
The goldfish needs 55 gals for a comet alone and 20 for one fancy
They get much bigger than people think- comets up to 18 inches and fancies 12 inches plus fancies get as big around as a coffee can
That's exactly what I did when I added driftwood to my tank

 

[danben]

Yeah I realize that the goldfish needs a larger tank, its just a temporary until it reaches about 2-3 inches in length (its a common btw, the feeders that you buy for 17 cents or so) and yeah I ended up doing about a 90% pwc and rearranged some stuff as well as added two amazon swords that were on sale for a dollar or so
Also, how big of a tank do paradise gouramis/angels need and could I use the ten gallon as a temporary?
Thanks

 

[emerald76]

I'd recommend a 30 at least
For one of them for a week or 2 maybe