tell me about it, its a pain in the back side! but i take about 300 litres out twice a week and i fill a 100 litre bucket up from the tap, i made a pipe to fit to the tap so i leave it running to fill the bucket, at the right temperature, add the dechlorinator. i have to fill it 3 times to fill the tank back up, takes about half an hour, but it takes me about an hour to siphon 300 litres out because i use a small pipe first to pick up the debris without sucking in all the sand then siphon the rest out with 1" pond hose and it takes about 1 minute!
but an hour and a half twice a week is nothing if i want to keep my fish healthy and happy!
now i have the rays i will be siphoning about 100 litres out every day to suck up debris as and debris left lying around could go mouldy and affect the rays.
the only thing i do differently to tolak i suppose is dechlorinating the water before it enteres the tank as opposed to dechlorinating the whole tank before/afterwards.