i got a 125 planted tank with a ornate burcher and a small pb in it. as for plants i have 2 small lotes's a large java furn and a huge mother sword. what i want to know is what kind of filter can i put on this tank right know there realy isent anything but the bio filter( yes i do water tests and the plants and bio filter are great to keep up with the little amount of bio load in the tank)i want to put a canister filter on the tank but i dont want to have a huge current on it what size could i yous? what should be the flow rate as well.as i said im just afraid of there being to much current and my duck weed and other plants being blown all over the place