Hi guys, I thought i'd give my goldfish tank a bit of attention as its sits in the dining room gettin pretty neglected at the moment. I know newly set up aquariums generally suffer from diatoms however this has been going on for over 2 years now. I thought it was something to do with the black sand i used form my LFS and was possibly causing silactes to leech into the water so i binned that and am currently operating bare bottomed with 2 bits of bogwood with some massive java ferns attached. I havent dosed this at all apart from water changes and even they are in frequent. I though i'd try and get this stabilised as its really ugly and even my borneo suckerfish cant keep up with eating it all. Does anyknow have any explanation for this and perhaps ways i can combat this once and for all? My tropical suffered the same thing for ages but i think its now about gone from there. Could dosing improve things for me? Thanks in advance.