cleaning cartridge filters

[gypsy3]

hi...i've got an aqua one 2400 and an older fluval 403 as well as an internal sponge.i know that the filters should be cleaned when the flow rate is slow, but how slow is slow?its a 6x2 with 12 discus. is there a general time frame, for example every 6 months or so and whats the procedure with cleaning them, as far as watching out for the bio load.do you just change the wool and leave the rest intact, wash part of the bio, or some other way?...thanks

[scott bowler]

hi gypsy3 when i wash mine filters out i do it around every 3 months . i use water from my tank. i take a bucket water from the tank and wash the sponges replace the wool and dont wash the bio at all i tip some of the water out. but leave some in it if i can. hope that helps scott

[gypsy3]

cool....thanks scott, gives me a better idea