how important is it, REALLY, to vacuum the your substrate?
the reason i ask is due to my frequent pwc
's. ive tried actually cleaning the gravel and it just seems like im tearin up my tank and freakin out my fish.
I do have lots of plants and ornamental decorations in my tank so, could it just be a case of havin to much stuff in there or what?
i do have a few fish that pretty much scavenge stuff from the substrate but i know that there is plenty of waste that works its way in there.
So....is it important? How often should i do it, if so?