Recently bought a fish tank and have been following the instructions extra for water changes etc.
Now today I had to top up the water, so exactly what I did last time, which was getting a clean bottle and then adding tap water but then add the tap safe solution.
However, this time I have noticed white spots appear on the corners of the aquarium which I assume are calcium deposits? this has happened within an hour of topping up the water? Any advice?
Have attached a pic as well :)http://img262.imageshack.us/i/img0257c.jpg/
Would appreciate any advice