Planted Tank Enthusiast
Join Date: Mar 2012
Location: st louis missouri
Well adding water from one tank to another really doesn't do much bacteria wise. Most of your BB are on the surfaces in your tank, substrate, filter media, plants, driftwood etc etc. If you're all out of options add a bit more media or whatnot from your established tank, and if you can add as many plants as possible. Floaters, like frogbit, water lettuce, duckweed, hornwort, fast growing stem plants like wisteria, pennywort, anything that will suck up the ammonia/nitrates will help. Also having someone come over and change your water for you would help alot to. That's just about all I can think about.
You may be able to find some ammonia absorbing media, that would stall your cycle, but it would keep your fish safe while you were away. I can't offer any advice on that route though. I've never used anything but purigen.
Hopefully a combination of these methods and your fish being able to breath are will work. Good luck, and have fun on your trip if it's for vacation or don't work too hard if it's for work!
You shouldn't take life to seriously. You'll never get out alive.