Fishchick,
It will be easier to let it filter to a bucket, it produces about 10 gallons and hour, or less depending on how bad your water is.
If you are using it to top off, then it is fine to just add.
If you are using it for water changes, you have to adjust it. It has no vitamins, minerals, Hardness is gone, Ph is 5.5 I think. It has no buffering whatsoever. SO topping off your water is ok cause it will quickly adjust to your Ph. But for water changes you must add electrlytes and such to it.
The hose attaches with a rubber thingy that would fit over a hose end easily.
I am returning my Tap water purifier today. I was told it really isn't needed to keep good plants even in my hard water. I guess they are right my 55 has nice plants in it.