What is the difference between a filter and tank cleaning?
A filter treats water as it passes a certain point, while tank cleaning removes the source of sediment, algae and dirt gathered on the floor and walls. One works on the flow; the other treats the store itself.
So installing a filter does not replace cleaning a tank that has built up sediment: the filter will fill quickly, and water may bypass it if it clogs or if a side line does not pass through it.
No home filter can repair a broken lid or damaged insulation through which dust, insects and light enter the tank.
The best approach is to see the tank and the filter as two links in one chain, each needing its own maintenance.
A common example is fitting a new filter after a complaint about water colour, only to see the same complaint months later because the sediment in the tank was never dealt with, so the filter becomes a temporary fix.
