Well, the problem with the using the hose, (the one for the garden and yard I presume), is possible contamination and adding undesirable bacteria from the outside, which may affect your bacteria that maintains the cycle. Also, the possible introduction of chemicals that could poison your fish. Also, if filling from an outside tap, it is probably not connected to your hot water system, and you could be causing some thermal shock on your refills.
How long is the siphon hose you have? It sounds like you need a longer one so the discharge end can get out your window far enough so it is substantially lower than your tank, greating the height difference you need.
I use a Python for my draining. It is not used for any other purpose than for my tanks.
http://www.petsolutions.com/Python+No+Spill+Clean+Fill-I-94002514-I-C-10251-C-.aspx
The sink attachment that comes with it...
http://www.petsolutions.com/Faucet+Pump-I-94000132-I-C-10251-C-.aspx
can be used two ways. One, to act as the driving force to pull water from your tank and send it down the sink drain. However, I do not like wasting water just to get water out of my tanks. That is why I just use the hose part of the Python to siphon water out a window or door.
The other way for the attachment to work, that I do use, is to refill the tanks from the sink tap. I can adjust the hot and cold taps to the desired temperature and then fill. No mess, no fuss, NO BUCKETS.
I also would stop using the cycle. You should only need a good water conditioner that removes chlorine/chloramine, like Prime. What other conditioners are you using? Most are completely unnecessary.