I am trying to cycle a new 10-gallon tank with 3 danios. Every day for 3 weeks the ammonia, nitrite and nitrate levels have been 0. Now I have brown algae on the gravel. What could be wrong?

More Questions. Additional questions in this category.

• 

  The pond behind my work has 5 alligators in it. Lately a company has been going out there & spraying a chemical to kill the plant life & algae in the water. Is this harmful to the gators & other wildlife that live by the pond?
  by snakelover on December 19th, 2007 | 5 people like this

• 

  What temperature does Algae stop growing
  by Dental mechanic on September 24th, 2008 | 2 people like this

• 

  I just heard someone say that algae is beautiful. Is this true or are they just out of their mind or what?
  by New Member on June 19th, 2007 | 5 people like this

• 

  How do you change the water? i change the filter on a weekly basis and the water temp is in the acceptable range of mid 70's. what do i add to keep the algae down? it was a gift to my daughter from her grandfather and i didnt want it for this exact reason
  by jay on July 25th, 2008 | 1 person likes this

• 

  I have the laziest plecostomus on the planet. It will ONLY eat the algae inside the cave thing it calls its home. I've got red algae taking over my tank, and I'm already over the limit on "recommended inches of fish". What to do?
  by Lady Alathia of Vulcan on July 14th, 2008 | 3 people like this

• More Algae issues See only professionally researched Algae issues questions