hi just got a new 30 gal tank. its second hand. my question is do i need to steralise it of will washing it be ok. also how long do i need it to be filled up to check for leaks. when im transfering my fish from my 10 gal to my 30 gal how much old aquariam water fo i neet to transfer. i only have one 10 leater buket so will not be able to trans much water and i cannot fill the 30 gal up as well as having the 10 gal in situe as i do not have the room. my las question is the tank kame with a fluval 4 power filter.. this thing is huge its about a foot long. does anyone have any info abt this filter and if there is any way of secuting it to the glass as it has no suction pads.