how to clean a fish tank???
ok, so i have picked up a nice little hexagonal fish tank but it had sat apprantly for near on 3 moths with the same water half empty so its got a nasty line around it..... how would i go about get this mark of the glass??? also the plastic lid has got what looks kida like rust (i defo isnt but thats the colour) and ideas on how to get rida that??? tried all sorts on both with no avail