Hello all, I hope your all well. I sold my Discus, tanks etc around 5 months ago due to having a life issue where i was living. I have since moved town and am settled again in a new home. I really miss fish keeping and i have the bug to again have fish. Of course ive never got over Discus, i must have them again. Even though i did everything wrong the first time and caused myself many broken hearts, i plan to start again. I have a few questions though, as i am starting brand new with everything. External Canister Filters, i have never used one but i would like to as i hear they give the best results for water quality. The tank size will be a 4 foot 200 liter tank. Would a 400 liter per hour canister filter be suffice for that tank or a 1400 liter per hour one be better? So its 2x the tank volume an hour or 7x, which would be best? The canister filter im looking at also has a UV light inside it, which i think is great. Also, do i need a hang on the back filter to connect to it? Sorry but i have no idea how it goes into the tank from the canister. If the tank needs to be drilled i with not be getting the canister. Fish, i plan to ship them from Sydney Discus World. I thought maybe only getting 3 Discus to start with in the first shipment. This way i would not over load filters or upset water stability. I am looking at 9-10 cm Discus, red melon, super yellow and white diamond. Would 3 be ok to start with? With plans to ship 2 more some time after that, a san merah and a fireball. This is just a plan right now, im not even buying the main tank for another 2 months. So i am open to other suggestions and ideas for the time being.