I.D on brown/green growth?

  1. S

    Stephani19 Valued Member Member

    Looking to find out what's growing in my tank. It's brown in colour and has a green spot forming. It's a bit hard to see on the rainbow rocks- sorry. I noticed a similar growth/colour on my white skull ornament a few weeks ago. I boiled that in vinegar then rinsed it 500 times and now it's pearly white again. Any help would be great! :)

    36G tank
    Lighting on from 8-11, then 3-7.
    Current stock is: 2 platies, 3 mollies, 6 neon tetras, 3 panda tetras, 3 black phantom tetras

    Current parameters:
    Ammonia: 0
    Nitrite: 0
    Nitrate: 20
    pH: 8.2

    I know we have high iron in our water (we live in a rural area, on a well).

    I use prime for each water change. ImageUploadedByFish Lore Aquarium Fish Forum1407287914.275368.jpg ImageUploadedByFish Lore Aquarium Fish Forum1407287941.246823.jpg


    Sent from my iPhone using Fish Lore Aquarium Fish Forum
     
  2. Marie1

    Marie1 Well Known Member Member

    It's diatoms and algae. The diatoms are common in new tanks. Do you have any live plants? You lights are on for an awfully long time if you do not have plants.
     
  3. Lyfeoffishing

    Lyfeoffishing Well Known Member Member

    Those do look like diatoms but he only has his light on for 7 hrs that actually might also be what is helping he diatoms grow. Unlike other algae diatoms thrive in lower light increments and it's suggest to either up your lighting schedule a few hours or just wait for them to go away on their own. They are not harmful to your fish in any way but can look unsightly. Some fish will actually eat the algae also.
     


  4. Marie1

    Marie1 Well Known Member Member

    The brown stuff is the diatoms, the green is algae. Since there is both, I would cut the lights all together for awhile. And once the diatoms have gone, that photo period is too long in my opinion without having live plants.
     
  5. OP
    OP
    S

    Stephani19 Valued Member Member

    Yeah there's no live plants. So I should cut back my lighting? I'm pretty sure I read a thing somewhere that the light should be on from 8-10 hours a day. I figured 7 worked just as well, lol.


    Sent from my iPhone using Fish Lore Aquarium Fish Forum
     
  6. jdhef

    jdhef Moderator Moderator Member

    Diatoms thrive with less light, so while it may cut down on green algae you will probably get even more diatoms
     
  7. OP
    OP
    S

    Stephani19 Valued Member Member

    Hmm. I'd prefer to see the green than the brown. More light it is then.