well josh ,, just got back from getting the filter , i have bought a EHEIM professional 3 , 2080 , this will be good for 1200 litres and turn over a max of 1700LPH , also it has a brain that increases output as media gets blocked to compensate , it has a service alarm and loadsa crap , but if i am gonna keep a rtc forever then this is the pump for me , my new tank gets a 2 year warranty on the seals so the rtc will get 2 year in there or less before i need the pond comissioning , dont let that rtc go as it has started to eat already ,, my savings lol,,, all good fun ,,