We set up our first tropical fish tank about three months ago. We were unlucky and got our first batch off fish with a disease which slowly kiled them all off but one. We were given a treatment from the pet shop which seemed to clear things up we then waited and added little tetras and guppies (I think that's right).
On a weekly basis we add the solutions to the water which is meant to keep everything in balance and the water is gradually changed.
However two weeks ago the tank started getting green seeweed type things growing from the ornaments and I realized the remaining fish from the original batch (the one with the illness) had died. I removed the plants with the "seeweed" growing from them , have not replaced as I wanted to wait until my husband returned (hes away for 6 weeks on business) to fix things. The fish still have ornaments and one big plant remaining. Now however some little gold markings are discolouring the glass and seem to be taking over quite quickly. Initially I thought they were finger prints on the outside from my Daughter but it seems they are definately on the inside of the glass and are now going around the whole tank including growing on the filter. It just looks dirty rather than a plant or anything.
Also upon closer inspection I have found that there are now little bits of "seeweed" starting to form on the other ornaments and they have become discoloured also in this brown/gold dirt and also there is a guppy on the gravel laying on its side flapping only a little.
As you can tell I am pretty clueless, I really want my fish to be happy and my tank to look nice so can you please tell me what to do ??? I am full of cold at the moment so can't get to the pet shop.
Also on a random note can you tell me if me touching the water could be harmful to me as I am heavily pregnant and concerned about cleaning the tank too much in case I manage to catch something... probably sounds silly but Id just like to put my mind to rest