What i've beend oing is syphoning out the water into a pail using a gravel vaccum which i then pour out. i then filled up a gallon jug with water from the tap that was at the right temperature, adding some conditioner, waited and then poured it in. i had to do this 5 times in order to fill the tank from the 50%
water change. obviously this is quite a pain. that is just for my 10 gallon tank, i'm switching to a 55 gal soon and even for a 20% water change filling up the galon jugg 11 times and conditioning it each time is going to be even more of a pain! what is the easiest way to do this?