my water seems to be getting a green tint to it,is this normal? and also,im just wondering,but i have a plant with roots planted in there,should i not be doing gravel vacs now so it has some fish poop to feed off or just not go too close to its roots? my fish are loving the hornwort,they are grazing it down each night,apart from that alls going well in my tank,apart from the elodea (sp?) it has a brownish hint on its leaves and doesnt seem to be growing,does this mean its dying and needs to come out,all new growth was bright green but it has only minimal new growth now. i thought this was supposed to be one of the hardiest plants to grow-does this mean i dont have green fingers lol?!