tgrattan
Aquarium Advice Newbie
I upgraded to a 75 gal tank on 6/6/14. I used all the decorations and filter media from my old tank. On 6/19/14 I added the 4 fish from my old tank, and test the water daily. My ammonia level is 0. NitrITES are 0. NitrATES are up to 5.0 and the pH runs between a 6.8 and 7.0 I am now getting a brown algae on the gravel and decorations. I never saw and ammonia spike?! Could it have done this sometime between the 13 days it was up and running before I added my fish, and could it be cycled already? My old tank was set up 8 years ago, I really don't remember the particulars of the cycle...