Hello all I currently have a 55l tank full cycled I've just bought 105l tank new filter heater , I've put the new cartride from the new filter in old tank wedged by a rock iam planning on leaving in tank for a week or so untill I set up new tank ,I'll be replacing my gravel with sand in new tank what's the best way to transfer my fish over to new tank I will be grateful for ideas and suggestions thanks