Ren&Stumpy
Fishaholic
Ok may sound stupid but my tank is about 1months cycled and still contains the internal filter (rio 400) but it also runs a Fluval 405. I want to replace the internal with a larger Canister that also contains the Heater which really leaves me with only a Eheim Thermo. Looking a the large 2180 just wondering who has one and how do you find it reliability etc (its alot of money) and obvioulsy i want to cycle the filter but am not sure if its advisable to do this yet as my tank is relatively "young". I cant see it being a problem but how long should i run the new external on the tank before removing the old internal?